The potential for IgM cross-reactivity with rheumatoid factor–positive serum samples was observed in blood tests used to detect IgM SARS-CoV-2 by means of gold immunochromatographic and enzyme-linked ...

A trial sponsored by the National Institutes of Health (NIH) is recruiting participants to study a nasal COVID-19 vaccine. The candidate vaccine aims to provide enhanced protection against variants of ...

Close-up of a hand holding a positive antigen test for COVID-19. SARS-CoV-2 antigen rapid test kit. Senior Correspondent Getting COVID-19 today is much less scary and more common than it was three ...

Please provide your email address to receive an email when new articles are posted on . Of plasma samples taken after COVID-19 infection, 7.5% to 12.6% contained detectable viral antigens. Researchers ...