As hundreds of test kits claim to offer accurate results on previous Covid-19 infection, scientists around the world are working hard to assess their accuracy

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At the Erasmus University Medical Centre in Rotterdam, Marion Koopmans and a team of scientists are going throught the laborious process of verifying antibody tests for Covid-19. Over the last two months, dozens of prospective tests have hit the market, and with many governments wanting to feed the results of large-scale testing into their decisions whether to end lockdowns, biological tests have rarely carried such weight.

Most of the tests are enthusiastically marketed, boasting of their ability to accurately detect whether someone has previously been infected with the Sars-CoV-2 virus. The painstaking job of proving whether the tests do what they say has fallen to a worldwide network of 12 independent centres, of which Koopmans’s team is one.

Phlebotomists process specimens of people getting tested for coronavirus antibodies in Spring Valley. ; Credit: Yana Paskova/Getty Images

As of Tuesday afternoon, L.A. County has at least 1,314 deaths and 27,836 confirmed cases of coronavirus.

New confirmed infections per day in the U.S. exceed 20,000, and deaths per day are well over 1,000,000 according to figures from Johns Hopkins University. And public health officials warn that the failure to flatten the curve and drive down the infection rate in places could lead to many more deaths — perhaps tens of thousands — as people are allowed to venture out and businesses reopen. From the marbled halls of Italy to the wheat fields of Kansas, health authorities are increasingly warning that the question isn’t whether a second wave of coronavirus infections and deaths will hit, but when — and how badly. President Donald Trump said his COVID-19 task force would keep working but focus more on rebooting the economy. According to the Orange County Register, more OC beaches received approval to open with limited hours.

Today on AirTalk, we get the latest on COVID-19. Do you have questions for our infectious disease specialist? Join the conversation by calling 866-893-5722. 

With files from LAist and the Associated Press 

Guest: 

Peter Chin-Hong, M.D., infectious disease specialist and professor of medicine at the UCSF Medical Center; he tweets @PCH_SF

This content is from Southern California Public Radio. View the original story at SCPR.org.

We explore what antibody testing is and the potential it has against the coronavirus as UC Davis Health begins testing some of its healthcare workers. Local county leaders check in, and the results of the Next Generation Jazz Festival.

Screening a sample of the population to see who has been infected with COVID-19 and who hasn't is a huge step forward in returning to normal life.

We need to be very cautious about preliminary studies estimating how many people have already been infected by the coronavirus

We need to be very cautious about preliminary studies estimating how many people have already been infected by the coronavirus

In New York, the number of patients coming to the ER with COVID-19 symptoms has dropped and there is hope that the worst is behind us. As we look to the future, many of my colleagues on the frontline are eager to know if they have antibodies.

Antibodies should indicate if someone has had an infection in the past. But the promise of “immunity testing” is plagued by uncertainty about how the immune system responds to the coronavirus, as well as concerns about the tests’ accuracy.

Inaccuracies in the testing, such as false negatives and false positives, are potentially harmful

We need to be very cautious about preliminary studies estimating how many people have already been infected by the coronavirus

The United Kingdom wasted $30 million on nearly two million antibody test kits found to be inaccurate.

CityMD launched walk-in antibody and COVID-19 testing Tuesday as New Yorkers waited for hours to receive a test to show if they had had coronavirus.

Ministers have ordered production of up to 50 million new immunity tests as part of what experts hope will be a 'game-changing' development in the battle against Covid-19.