COVID-19 is a contagious disease caused by the coronavirus SARS-CoV-2. In January 2020, the disease spread worldwide, resulting in the COVID-19 pandemic. The symptoms of COVID‑19 can vary but often ...

A possible first case of COVID recurrence after ensitrelvir: a vaccinated woman whose antigen levels fall and then rebound, with symptoms returning 1 day after treatment.

Ensitrelvir, an oral SARS-CoV-2 3C-like protease inhibitor, reduced symptomatic RT-PCR-confirmed COVID-19 among household ...

The antiviral drug ensitrelvir prevents infection in household contacts of COVID-19 patients when given within 72 hours after symptom onset in the index patient, according to a Phase III randomized ...

Helen Branswell covers issues broadly related to infectious diseases, including outbreaks, preparedness, research, and vaccine development. Follow her on Mastodon and Bluesky. You can reach Helen on ...

"Cicada" is trending, but not because it's the season for the noisy insects to appear. The Centers for Disease Control and Prevention and the World Health Organization are both monitoring a COVID-19 ...

The Food and Drug Administration (FDA) is investigating whether the COVID-19 vaccines were associated with any deaths across all age ranges. “FDA is doing a thorough investigation, across multiple age ...

An over-the-counter nasal spray which has been used for years as a safe and effective treatment for seasonal allergies could potentially prevent Covid infections, according to clinical trial results ...

June 26, 2025 – The new COVID-19 variant that now makes up about a third of U.S. COVID cases has a signature symptom: a painful sore throat that feels like "razor blades." "This 'razor blade sore ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. The world was transformed by the emergence of SARS-CoV-2, the ...