You wake up with a scratchy throat, runny nose, and persistent cough, but your at-home COVID-19 test reads negative. How is this possible? The short answer is yes—you can still be infected. Many other ...

As the nation experiences what many experts believe is the second-largest wave of COVID infections since the pandemic started, many Americans will be checking to make sure they don’t have the ...

Receiving a non-reactive HIV test result brings immense relief for most people, but understanding what this outcome truly means requires more than a simple celebration. While a negative result ...

Colorized transmission electron micrograph of multiple HIV-1 virus particles (green) budding from a cell projection from an H9 cell (burgundy). Image captured at the NIAID Integrated Research Facility ...

Test performance persisted in an era of widespread flu, COVID-19, and RSV transmission and of vaccination against SARS-CoV-2. Fingerstick test’s sensitivities vs RT-PCR: influenza, 93.3%; SARS-CoV-2, ...

A randomized clinical trial led by Johns Hopkins researchers finds that giving patients a next-day HIV viral load (VL) test ...