COVID-19 may have infected ~20 million Americans—10X the official case count, the CDC said yesterday, CNN reports, citing comments from CDC chief Robert Redfield yesterday. Redfield’s estimate, based on serology testing for antibodies to the virus,…

This pandemic has made it clear that disease surveillance is too slow.   Instead of relying on a patchwork of health providers to report unusual events, what if anywhere that collects blood could be on the lookout for unusual antibodies?   That’s the aim of the Global…

Early results from human testing of a vaccine against the novel coronavirus suggest—but don’t prove—that it offers some immunity, The Washington Post reports.  

Nearly all people exposed to COVID-19 in a New York study developed antibodies to the virus—even those who showed just mild symptoms, according to a New York Times analysis of a preprint study. Based on antibody tests on the first set of donors for a convalescent plasma…

Testing is the linchpin to understanding COVID-19’s spread—but both genetic tests—which check for active infections—and antibody tests—which identify past infection—have proven unreliable. Tests are hard to get right. The best ones strikes a very delicate balance between…

No therapy, no vaccine. At least, COVID-19 survivors can be tested for antibodies and know they’re immune, right?  Wrong. WHO threw cold water on that assumption on Friday, saying there’s no evidence that if you’ve survived COVID-19, you have immunity, according to the …

Antibody tests could play an important role on whether it’s safe to “reopen.” The tests detect whether a person has ever been exposed to the virus—important insight for overall cases counts.   90+ such tests are on the market, but only 1 is FDA-authorized—and accuracy…

Countries that adopted a test, track and treat approach gained an early edge against COVID-19.

Ebola researchers in the Democratic Republic of the Congo have adapted to working in a war zone, Amy Maxmen reports in Nature. A massive vaccination campaign pivoted to deter attacks, researchers are rushing to complete genomic sequencing of virus samples, and an…