More than two years after the World Health Organization (WHO) declared an end to the emergency phase of the Covid-19 pandemic, the virus continues to circulate globally. While current data suggest ...

The availability of a four-in-one respiratory virus diagnostic for home use may be a boon to consumers, but some clinicians say it should not be used as a substitute for a physician’s guidance. The ...

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 ...