spread The Spread of Coronavirus: Eastern Europe Prepares for the Inevitable By www.spiegel.de Published On :: Thu, 19 Mar 2020 13:40:38 +0100 Many countries in Eastern Europe are taking drastic measures to slow the spread of COVID-19 -- in part because their health-care systems may not be up to the task. Full Article
spread Ischgl, Austria: A Corona Hotspot in the Alps Spread Virus Across Europe By www.spiegel.de Published On :: Tue, 31 Mar 2020 19:40:39 +0200 The Austrian winter-sports mecca of Ischgl is well known for its parties. But after helping spread the virus across Europe, the town's reputation is changing to one of incompetence and greed. Full Article
spread The science of Sundance: Digging into a theory the coronavirus was spreading early in Utah By www.sltrib.com Published On :: Thu, 07 May 2020 21:31:15 +0000 Full Article
spread Social distancing to prevent coronavirus spread isn’t happening in NYC courts By www.nydailynews.com Published On :: Mon, 23 Mar 2020 11:00:00 +0000 While an increasing number of criminal suspects are being arraigned by video to prevent the spread of coronavirus, defendants’ families often sit on crowded courthouse benches waiting for their relatives’ arraignments. Full Article
spread Success Academy shuts down all NYC charter schools amid coronavirus spread By www.nydailynews.com Published On :: Fri, 13 Mar 2020 14:41:58 +0000 Success Academy Charter Schools, which teaches 18,000 students across 45 schools in the city, will move to online learning starting Mar. 19, though officials didn’t specify how long the shutdown will last. Full Article
spread NYC teachers union threatens lawsuit if schools still open Monday amid coronavirus spread By www.nydailynews.com Published On :: Sun, 15 Mar 2020 19:26:00 +0000 Mulgrew accused city officials of not complying with state protocol on school closures - which mandates 24-hour shutdowns if a student or staff member tests positive - and creating unsafe labor conditions. Full Article
spread Tracking The Pandemic: How Quickly Is The Coronavirus Spreading State By State? By www.npr.org Published On :: Sat, 09 May 2020 08:15:27 -0400 View our map and graphics to see where COVID-19 is hitting hardest in the U.S., which state outbreaks are growing the fastest and which are leveling off. Full Article
spread Coronavirus World Map: Tracking The Spread Of The Outbreak By www.npr.org Published On :: Sat, 09 May 2020 08:22:13 -0400 A map of confirmed COVID-19 cases and deaths around the world. The respiratory disease has spread rapidly across six continents and has killed thousands of people. Full Article
spread The new coronavirus might spread when people talk, but scientists say masks can help By www.latimes.com Published On :: Sat, 4 Apr 2020 07:00:06 -0400 It's possible that the new coronavirus can spread from person to person simply by talking, or even breathing, according to preliminary studies. Full Article
spread Everyone infected with the coronavirus is a silent spreader for at least a while By www.latimes.com Published On :: Thu, 16 Apr 2020 13:10:46 -0400 A study of COVID-19 patients and the people they likely infected suggests the coronavirus can spread for more than two days before symptoms appear. Full Article
spread Coronavirus infections could be much more widespread than believed, California study suggests By www.latimes.com Published On :: Fri, 17 Apr 2020 18:05:07 -0400 A new study by Stanford University, using antibody blood tests, estimates that the number of cases in Santa Clara County may be 50 to 85 times greater than what was previously known. Full Article
spread Millions affected as schools across U.S close to combat spread of coronavirus By www.latimes.com Published On :: Sat, 14 Mar 2020 06:00:49 -0400 The closure of schools affects millions of students and is another dramatic step in the coronavirus outbreak. Full Article
spread As virus spreads, this Bay Area college wants students to return and clean their dorm rooms By www.latimes.com Published On :: Thu, 26 Mar 2020 10:48:00 -0400 St. Mary's College in Moraga is requiring students to return and clean out their dorm rooms by April 14. Fearful of coronavirus, some parents are livid. Full Article
spread Editorial: Widespread coronavirus testing won't help end the pandemic if it's inaccurate By www.latimes.com Published On :: Sun, 3 May 2020 06:00:24 -0400 Some antibody tests for COVID-19 have unacceptably high rates of false positives. Full Article
spread Firefighters open up their stations to spread Christmas cheer By www.london-fire.gov.uk Published On :: Fri, 13 Dec 2019 11:54:18 Z Crews across London have been getting into the Christmas spirit by holding festive lunches and parties for elderly and vulnerable people who live nearby. Full Article
spread Fire safety warning as millions work from home to stem spread of Covid-19 By www.london-fire.gov.uk Published On :: Tue, 24 Mar 2020 08:45:33 Z Firefighters are issuing urgent #StayHomeStaySafe advice as millions of people enter their first full week of working from home amidst the Coronavirus pandemic Full Article
spread Major U.S. airlines will require masks to slow coronavirus spread By www.latimes.com Published On :: Fri, 1 May 2020 17:17:08 -0400 To slow the spread of the novel coronavirus, passengers soon will be required to wear masks by the largest airlines in the U.S. Full Article
spread Artists, live industry brace for a year without concerts: 'Is there a better place for spreading disease?' By www.latimes.com Published On :: Fri, 17 Apr 2020 12:39:39 -0400 Epidemiologists and government officials agree that large-scale concerts and festivals can't be safely held until 2021, a crushing blow. Full Article
spread COVID-19 updates: Washington County counts 9 new cases Monday; state says spread is slowing By rssfeeds.thespectrum.com Published On :: Mon, 04 May 2020 20:38:02 +0000 Health officials counted nine new cases of COVID-19 in southwest Utah, although the Utah epidemiologist says infection rates are in decline. Full Article
spread Letters: Indiana can reduce the spread of coronavirus by instituting mail voting By rssfeeds.indystar.com Published On :: Sat, 21 Mar 2020 03:01:46 +0000 Our state is taking the wise step of reducing unnecessary public gatherings and that includes voting. Full Article
spread Letters: Coronavirus spreads indiscriminately through communities By rssfeeds.indystar.com Published On :: Sat, 21 Mar 2020 05:18:52 +0000 Take this virus seriously and do your part to protect everyone in the community, a letter to the editors says. Full Article
spread IMPD targets illegal parties where virus may spread. One, some fear, ended a girl's life. By rssfeeds.indystar.com Published On :: Mon, 04 May 2020 20:14:31 +0000 A bullet struck 16-year-old Nya Cope in the head just a short distance from a gathering that attracted large groups to an east side parking lot. Full Article
spread With schools closed, day cares step up: What to know about child care as COVID-19 spreads By rssfeeds.indystar.com Published On :: Wed, 25 Mar 2020 21:03:57 +0000 Indianapolis is partnering with YMCA, At Your School and Early Learning Indiana to provide care for children of first responders at a discounted rate. Full Article
spread Pool rules: Riverside County says spread out, stay in your lane By www.latimes.com Published On :: Thu, 7 May 2020 11:58:25 -0400 Pool parties are frowned on, as health officials offer guidelines for the use of apartment and HOA pools and spas. Full Article
spread Op-ed: Coronavirus spread in nursing homes not a result of inattentiveness By rssfeeds.indystar.com Published On :: Sun, 26 Apr 2020 10:00:02 +0000 Because the virus is hard to control even with all the steps being taken, we must remain vigilant in the steps we are taking, Zach Cattell writes. Full Article
spread How the spread of coronavirus is testing Africa By www.bbc.co.uk Published On :: Sat, 11 Apr 2020 00:55:20 GMT A surge in cases of Covid-19 will push the continent's health infrastructure to the limit. Full Article
spread Ahmedabad Police Detain 4 for Spreading Rumours on Amit Shah's Health - The Wire By news.google.com Published On :: Sat, 09 May 2020 13:00:35 GMT Ahmedabad Police Detain 4 for Spreading Rumours on Amit Shah's Health The WireI am healthy, not suffering from any disease, says Amit Shah Times of IndiaHM Amit Shah silences all the rumour mongers, says 'No need to worry' TIMES NOWNot Allowing Migrants' Trains "Injustice": Amit Shah To Mamata Banerjee NDTV'Not Suffering From Any Disease': Amit Shah Dismisses Rumours About His Health Outlook IndiaView Full coverage on Google News Full Article
spread News24.com | WATCH | Faithful undeterred at Ramadan, even as virus spreads in Somalia By www.news24.com Published On :: Fri, 08 May 2020 12:52:45 +0200 Adan Abdullahi knows that visiting the mosque for evening prayers is forbidden. There is a curfew in place in the Somali capital, and authorities have pleaded with worshippers to stay home as coronavirus infections rise. Full Article
spread Facebook's fight against coronavirus misinformation could boost pressure on the company to get more aggressive in removing other falsehoods spreading across the social network (FB) By feedproxy.google.com Published On :: Sat, 09 May 2020 09:12:00 -0400 Facebook is taking a harder line on misinformation related to coronavirus than it has on other health topics in the past. This decision may increase the pressure on the company to act more decisively against other forms of harmful falsehoods that spread on its social networks. Facebook is banning events that promote flouting lockdown protests, and is removing the conspiracy theory video "Plandemic." But false claims that vaccines are dangerous still proliferate on Facebook — even though they contribute to the deaths of children. Amid the pandemic, Facebook is taking a harder line on misinformation than it has in the past. That decision may come back to haunt it. As coronavirus has wreaked havoc across the globe, forcing lockdowns and disrupting economies, false information and hoaxes have spread like wildfire on social media. Miracle cures, intentional disinformation about government policies, and wild claims that Bill Gates orchestrated the entire health crisis abound. In the past, Facebook has been heavily criticised for failing to take action to stop its platform being used to facilitate the spread of misinformation. To be sure, coronavirus falsehoods are still easily found on Facebook — but the company has taken more decisive action than in previous years: For starters, Facebook is now displaying warning messages to people who have shared false information about COVID-19. They're imperfect — Stat reported that they may be too vague in their wording to have a major impact — but it's a step further than Facebook has taken on misinformation in the past. The company is also taking down event pages for events that reject mainstream science on coronavirus by calling on people to flout lockdown rules. And it is banning "Plandemic," a conspiratorial video about coronavirus that has been going viral on social media and contains numerous falsehoods. But Facebook's actions to combat COVID-19 misinformation may backfire — in the sense that it has the potential to dramatically increase pressure on the company to take stronger action against other forms of misinformation. The company has long struggled with how to handle fake news and hoaxes; historically, its approach is not to delete them, but to try to artificially stifle their reach via algorithmic tweaks. Despite this, pseudoscience, anti-government conspiracy theories, and other falsehoods still abound on the social network. Facebook has now demonstrated that it is willing to take more decisive action on misinformation, when the stakes are high enough. Its critics may subsequently ask why it is so reticent to combat the issue when it causes harm in other areas — particularly around other medical misinformation. One expected defence for Facebook? That it is focused on taking down content that causes "imminent harm," and while COVID-19 misinformation falls into that category, lots of other sorts of falsehoods don't. However, using "imminence" as the barometer of acceptability is dubious: Vaccine denialism directly results in the deaths of babies and children. That this harm isn't "imminent" doesn't make it any less dangerous — but, for now, such material is freely posted on Facebook. Far-right conspiracy theories like Pizzagate, and more recent, Qanon, have also spread on Facebook — stoking baseless fears of shadowy cabals secretly controlling the government. These theories don't intrinsically incite harm, but have been linked to multiple acts of violence, from a Pizzagate believer firing his weapon in a pizza parlour to the Qanon-linked killing of a Gambino crime boss. (Earlier this week, Facebook did take down some popular QAnon pages — but for breaking its rules on fake profiles, rather than disinformation.) And Facebook is still full of groups rallying against 5G technology, making evidence-free claims about its health effects (and now, sometimes linking it to coronavirus in a messy web). These posts exist on a continuum, with believers at the extreme end attempting to burn down radio towers and assault technicians; Facebook does take down such incitements to violence, but the more general fearmongering that can act as a gateway to more extreme action remains. This week, Facebook announced the first 20 members of its Oversight Board — a "Supreme Court"-style entity that will review reports from users make rulings as to what objectionable content is and isn't allowed on Facebook and Instagram, with — in theory — the power to overrule the company. It remains to be seen whether its decisions may affect the company's approach for misinformation, and it still needs to appoint the rest of its members and get up and running. For now, limits remain in place as to what Facebook will countenance in its fight against coronavirus-specific misinformation. CEO Mark Zuckerberg said the company would immediately take down posts advertising dangerous false cures to COVID-19, like drinking bleach. It is "obviously going to create imminent harm," he said in March. "That is just in a completely different class of content than the back-and-forth accusations a candidate might make in an election." But in April, President Donald Trump suggested that people might try injecting a "disinfectant" as a cure, which both has the potential to be extremely harmful, and will not cure coronavirus. Facebook is not taking down video of his comments. Do you work at Facebook? Contact Business Insider reporter Rob Price via encrypted messaging app Signal (+1 650-636-6268), encrypted email (robaeprice@protonmail.com), standard email (rprice@businessinsider.com), Telegram/Wickr/WeChat (robaeprice), or Twitter DM (@robaeprice). We can keep sources anonymous. Use a non-work device to reach out. PR pitches by standard email only, please.SEE ALSO: Facebook announced the first 20 members of its oversight board that will decide what controversial content is allowed on Facebook and Instagram Join the conversation about this story » NOW WATCH: A cleaning expert reveals her 3-step method for cleaning your entire home quickly Full Article
spread Fin24.com | WhatsApp tightens rules on sharing to curb spread of fake virus news By www.fin24.com Published On :: Tue, 07 Apr 2020 18:46:07 +0200 WhatsApp on Tuesday placed new limits on message forwarding as part of an effort to curb the spread of misinformation about the coronavirus pandemic. Full Article
spread Channel24.co.za | LISTEN: Miriam Makeba’s joyful Pata Pata re-recorded to spread information and hope in the time of Covid-19 By www.channel24.co.za Published On :: Thu, 23 Apr 2020 14:05:18 +0200 You can listen to this version of the 'world's most joyous song' here. Full Article
spread Man Posts Hilarious ‘Bad Dad Jokes’ Daily on Sign in Front Lawn To Spread Cheer to Neighbors By www.westernjournal.com Published On :: Sat, 09 May 2020 15:29:07 +0000 When jokes are so horrible, so obvious, so corny that they make your eyes roll, it’s a good chance that they’re what many call “dad jokes.” Bordering on lame, and all the more hilarious because of it, these jokes are so bad and yet fathers seem to get such joy from trotting out the perfect… The post Man Posts Hilarious ‘Bad Dad Jokes’ Daily on Sign in Front Lawn To Spread Cheer to Neighbors appeared first on The Western Journal. Full Article Lifestyle Fatherhood Funny humor parenting Uplifting
spread VIDEO: GOP senator says China made ‘conscious decision’ to allow COVID-19 to spread beyond border By dennismichaellynch.com Published On :: Sat, 09 May 2020 16:53:12 +0000 The DML News App offers the best in news reporting. The post VIDEO: GOP senator says China made ‘conscious decision’ to allow COVID-19 to spread beyond border appeared first on Dennis Michael Lynch. Full Article News Feed Powered by DMLNewsApp.com
spread Local health unit credits public with slowing COVID spread, encourages cottagers to stay home By barrie.ctvnews.ca Published On :: Fri, 8 May 2020 16:50:00 -0400 While infection rates remain steady across the region, the Simcoe Muskoka District Health Unit is reporting more than half of all 360 cases have now recovered. Full Article
spread The major subunit of widespread competence pili exhibits a novel and conserved type IV pilin fold [Protein Structure and Folding] By feedproxy.google.com Published On :: 2020-05-08T03:41:14-07:00 Type IV filaments (T4F), which are helical assemblies of type IV pilins, constitute a superfamily of filamentous nanomachines virtually ubiquitous in prokaryotes that mediate a wide variety of functions. The competence (Com) pilus is a widespread T4F, mediating DNA uptake (the first step in natural transformation) in bacteria with one membrane (monoderms), an important mechanism of horizontal gene transfer. Here, we report the results of genomic, phylogenetic, and structural analyses of ComGC, the major pilin subunit of Com pili. By performing a global comparative analysis, we show that Com pili genes are virtually ubiquitous in Bacilli, a major monoderm class of Firmicutes. This also revealed that ComGC displays extensive sequence conservation, defining a monophyletic group among type IV pilins. We further report ComGC solution structures from two naturally competent human pathogens, Streptococcus sanguinis (ComGCSS) and Streptococcus pneumoniae (ComGCSP), revealing that this pilin displays extensive structural conservation. Strikingly, ComGCSS and ComGCSP exhibit a novel type IV pilin fold that is purely helical. Results from homology modeling analyses suggest that the unusual structure of ComGC is compatible with helical filament assembly. Because ComGC displays such a widespread distribution, these results have implications for hundreds of monoderm species. Full Article
spread A Proteome-wide, Quantitative Survey of In Vivo Ubiquitylation Sites Reveals Widespread Regulatory Roles By feedproxy.google.com Published On :: 2011-10-01 Sebastian A. WagnerOct 1, 2011; 10:M111.013284-M111.013284Research Full Article
spread On the solvability of a class of nonlinear integral equations in the problem of a spread of an epidemic By www.ams.org Published On :: Fri, 10 Apr 2020 08:09 EDT A. G. Sergeev and Kh. A. Khachatryan Trans. Moscow Math. Soc. 80 (2020), 95-111. Abstract, references and article information Full Article
spread Resisting the Spread of Disease - Part 2 By www.ams.org Published On :: Mon, 28 Sep 2009 09:58:07 -0400 One of the most useful tools in analyzing the spread of disease is a system of evolutionary equations that reflects the dynamics among three distinct categories of a population: those susceptible (S) to a disease, those infected (I) with it, and those recovered (R) from it. This SIR model is applicable to a range of diseases, from smallpox to the flu. To predict the impact of a particular disease it is crucial to determine certain parameters associated with it, such as the average number of people that a typical infected person will infect. Researchers estimate these parameters by applying statistical methods to gathered data, which aren.t complete because, for example, some cases aren.t reported. Armed with reliable models, mathematicians help public health officials battle the complex, rapidly changing world of modern disease. Today.s models are more sophisticated than those of even a few years ago. They incorporate information such as contact periods that vary with age (young people have contact with one another for a longer period of time than do adults from different households), instead of assuming equal contact periods for everyone. The capacity to treat variability makes it possible to predict the effectiveness of targeted vaccination strategies to combat the flu, for instance. Some models now use graph theory and matrices to represent networks of social interactions, which are important in understanding how far and how fast a given disease will spread. For More Information: Mathematical Models in Population Biology and Epidemiology, Fred Brauer and Carlos Castillo-Chavez. Full Article
spread Resisting the Spread of Disease - Part 1 By www.ams.org Published On :: Mon, 28 Sep 2009 09:54:18 -0400 One of the most useful tools in analyzing the spread of disease is a system of evolutionary equations that reflects the dynamics among three distinct categories of a population: those susceptible (S) to a disease, those infected (I) with it, and those recovered (R) from it. This SIR model is applicable to a range of diseases, from smallpox to the flu. To predict the impact of a particular disease it is crucial to determine certain parameters associated with it, such as the average number of people that a typical infected person will infect. Researchers estimate these parameters by applying statistical methods to gathered data, which aren.t complete because, for example, some cases aren.t reported. Armed with reliable models, mathematicians help public health officials battle the complex, rapidly changing world of modern disease. Today.s models are more sophisticated than those of even a few years ago. They incorporate information such as contact periods that vary with age (young people have contact with one another for a longer period of time than do adults from different households), instead of assuming equal contact periods for everyone. The capacity to treat variability makes it possible to predict the effectiveness of targeted vaccination strategies to combat the flu, for instance. Some models now use graph theory and matrices to represent networks of social interactions, which are important in understanding how far and how fast a given disease will spread. For More Information: Mathematical Models in Population Biology and Epidemiology, Fred Brauer and Carlos Castillo-Chavez. Full Article
spread The more we lose biodiversity, the worse will be the spread of infectious diseases By qz.com Published On :: Thu, 30 Apr 2020 00:00:00 GMT Do biodiversity losses aggravate transmission of infectious diseases spread by animals to humans? The jury is still out but several scientists say there is a "biodiversity dilution effect" in which declining biodiversity results in increased infectious-disease transmission. Full Article
spread CBD News: The guidance addresses a major pathway for introduction and spread of invasive alien species, as a significant percentage of global invasive introductions result from pets, aquarium and terrarium species that escape from confined conditions and By www.cbd.int Published On :: Fri, 10 Oct 2014 00:00:00 GMT Full Article
spread CRISPR-Cas12a has widespread off-target and dsDNA-nicking effects [DNA and Chromosomes] By www.jbc.org Published On :: 2020-04-24T06:08:45-07:00 Cas12a (Cpf1) is an RNA-guided endonuclease in the bacterial type V-A CRISPR-Cas anti-phage immune system that can be repurposed for genome editing. Cas12a can bind and cut dsDNA targets with high specificity in vivo, making it an ideal candidate for expanding the arsenal of enzymes used in precise genome editing. However, this reported high specificity contradicts Cas12a's natural role as an immune effector against rapidly evolving phages. Here, we employed high-throughput in vitro cleavage assays to determine and compare the native cleavage specificities and activities of three different natural Cas12a orthologs (FnCas12a, LbCas12a, and AsCas12a). Surprisingly, we observed pervasive sequence-specific nicking of randomized target libraries, with strong nicking of DNA sequences containing up to four mismatches in the Cas12a-targeted DNA-RNA hybrid sequences. We also found that these nicking and cleavage activities depend on mismatch type and position and vary with Cas12a ortholog and CRISPR RNA sequence. Our analysis further revealed robust nonspecific nicking of dsDNA when Cas12a is activated by binding to a target DNA. Together, our findings reveal that Cas12a has multiple nicking activities against dsDNA substrates and that these activities vary among different Cas12a orthologs. Full Article
spread Ultraviolet light exposes contagion spread from improper PPE use By www.eurekalert.org Published On :: Wed, 06 May 2020 00:00:00 EDT (Florida Atlantic University) Despite PPE use, reports show that many health care workers contracted COVID-19. A novel training technique reinforces the importance of using proper procedures to put on and take off PPE when caring for patients during the pandemic. Researchers vividly demonstrate how aerosol-generating procedures can lead to exposure of the contagion with improper PPE use. The most common error made by the health care workers was contaminating the face or forearms during PPE removal. Full Article
spread Study traces spread of early dairy farming across Western Europe By www.eurekalert.org Published On :: Mon, 27 Apr 2020 00:00:00 EDT (University of York) An international team of scientists, led by researchers at the University of York, analysed the molecular remains of food left in pottery used by the first farmers who settled along the Atlantic Coast of Europe from 7,000 to 6,000 years ago. Full Article
spread The major subunit of widespread competence pili exhibits a novel and conserved type IV pilin fold [Protein Structure and Folding] By feedproxy.google.com Published On :: 2020-05-08T03:41:14-07:00 Type IV filaments (T4F), which are helical assemblies of type IV pilins, constitute a superfamily of filamentous nanomachines virtually ubiquitous in prokaryotes that mediate a wide variety of functions. The competence (Com) pilus is a widespread T4F, mediating DNA uptake (the first step in natural transformation) in bacteria with one membrane (monoderms), an important mechanism of horizontal gene transfer. Here, we report the results of genomic, phylogenetic, and structural analyses of ComGC, the major pilin subunit of Com pili. By performing a global comparative analysis, we show that Com pili genes are virtually ubiquitous in Bacilli, a major monoderm class of Firmicutes. This also revealed that ComGC displays extensive sequence conservation, defining a monophyletic group among type IV pilins. We further report ComGC solution structures from two naturally competent human pathogens, Streptococcus sanguinis (ComGCSS) and Streptococcus pneumoniae (ComGCSP), revealing that this pilin displays extensive structural conservation. Strikingly, ComGCSS and ComGCSP exhibit a novel type IV pilin fold that is purely helical. Results from homology modeling analyses suggest that the unusual structure of ComGC is compatible with helical filament assembly. Because ComGC displays such a widespread distribution, these results have implications for hundreds of monoderm species. Full Article
spread First case of Zika virus spread through sexual contact is detected in UK By feeds.bmj.com Published On :: Thursday, December 1, 2016 - 15:45 Full Article
spread Rogue tourists arrested as Hawaii tries to curb virus spread By jamaica-gleaner.com Published On :: Thu, 07 May 2020 10:21:49 -0500 HONOLULU (AP) — Hawaii authorities are cracking down on rogue tourists who are visiting beaches, riding personal watercraft, shopping and generally flouting strict requirements that they quarantine for 14 days after arriving. A newlywed... Full Article
spread Jamaican art spreads warmth in St Petersburg By jamaica-gleaner.com Published On :: Sun, 03 May 2020 00:13:49 -0500 St Petersburg is undoubtedly one of the most picturesque cities in the world – from its European-inspired architecture, its signature colourful, eclectic-style to its neoclassical and Baroque style to its water corridors, and the art, the city is a... Full Article
spread CRISPR-Cas12a has widespread off-target and dsDNA-nicking effects [DNA and Chromosomes] By feedproxy.google.com Published On :: 2020-04-24T06:08:45-07:00 Cas12a (Cpf1) is an RNA-guided endonuclease in the bacterial type V-A CRISPR-Cas anti-phage immune system that can be repurposed for genome editing. Cas12a can bind and cut dsDNA targets with high specificity in vivo, making it an ideal candidate for expanding the arsenal of enzymes used in precise genome editing. However, this reported high specificity contradicts Cas12a's natural role as an immune effector against rapidly evolving phages. Here, we employed high-throughput in vitro cleavage assays to determine and compare the native cleavage specificities and activities of three different natural Cas12a orthologs (FnCas12a, LbCas12a, and AsCas12a). Surprisingly, we observed pervasive sequence-specific nicking of randomized target libraries, with strong nicking of DNA sequences containing up to four mismatches in the Cas12a-targeted DNA-RNA hybrid sequences. We also found that these nicking and cleavage activities depend on mismatch type and position and vary with Cas12a ortholog and CRISPR RNA sequence. Our analysis further revealed robust nonspecific nicking of dsDNA when Cas12a is activated by binding to a target DNA. Together, our findings reveal that Cas12a has multiple nicking activities against dsDNA substrates and that these activities vary among different Cas12a orthologs. Full Article
spread Coronavirus Is Spreading across Borders, But It Is Not a Migration Problem By www.migrationpolicy.org Published On :: Tue, 03 Mar 2020 11:52:00 -0500 Travel bans, border closures, and other migration management tools did not prove effective at blocking COVID-19 from spreading across international borders. Yet as governments have shifted from containment to mitigation with the coronavirus now in community transmission in many countries, these restrictions are a logical part of the policy toolkit in the context of social distancing and restricting all forms of human movement, as this commentary explores. Full Article