Transfusion of serum sourced from resistant individuals [Tom Ritch]

Blood tests show 14% of people are now immune to covid-19 in one town in Germany [MIT]

Estimates of the Undetected Rate among the SARS-CoV-2 Infected using Testing Data from Iceland [James Stock et al]

What Immunity to COVID-19 Really Means [Scientific American]

NIH Begins Study to Quantify Undetected Cases of Coronavirus Infection [NIH]

How many tests for COVID-19 are being performed around the world? [Oxford]

‘It’s Just Everywhere Already’: How Delays in Testing Set Back the U.S. Coronavirus Response [NY Times]

‘We’re behind the curve’: U.S. hospitals confront the challenges of large-scale coronavirus testing [Science]

How this South Korean company created coronavirus test kits in three weeks [CNN]

CDC developing serologic tests that could reveal full scope of U.S. coronavirus outbreak [STAT]

First Results Of General Population Screening: About 1% Of Icelanders With Coronavirus [Reykjavik Grapevine]

Everyone In Iceland Can Get Tested For The Coronavirus. Here’s How The Results Could Help All Of Us. [Buzzfeed]

Iceland’s testing suggests 50% of COVID-19 cases are asymptomatic [ZME Science]

Spanish capital ditches ‘unreliable’ Chinese coronavirus test kits [SCMP]

Why coronavirus antibody testing in one Colorado town could provide a way forward [ABC]

How Covid-19 immunity testing can help people get back to work [Vox]