We were unable to process your request. Please try again later. If you continue to have this issue please contact customerservice@slackinc.com. Most people who reported a reaction to a COVID-19 ...

An international study of around 99 million people confirmed known serious side effects of COVID-19 vaccination. It also identified a possible relationship between the first dose of the Moderna ...

Please provide your email address to receive an email when new articles are posted on . Delayed large local skin reactions were most common. 40% had a negative change in their perception of the ...

Add Yahoo as a preferred source to see more of our stories on Google. Spencer Platt/Getty Stock image of a Covid vaccine clinic. Scientists are trying to understand why a small number of people may ...

Some Americans seem to be extra-alarmed about Ebola and hantavirus in the wake of COVID-19. But public health experts say they don't expect another pandemic this time.

Editor's note: Find the latest COVID-19 news and guidance in Medscape's Coronavirus Resource Center. For people who experienced an allergic reaction to their first mRNA COVID-19 vaccine, skin testing ...

Pediatric pneumonia outbreaks in multiple countries have some doctors and families concerned — but statements from public health agencies suggest there’s no cause for alarm. This is similar to their ...

Two patients reported worse headaches after drinking the same amount of alcohol they would have consumed prior to having COVID. One patient, a 40-year-old woman with a history of Ehlers-Danlos ...

I am a severe myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) patient. I have some information to impart about ME/CFS and drug development and how it can aid long COVID R&D (C&EN, Sept. 30 ...

Pronounced cognitive slowing distinguished people with long COVID from others, a cross-sectional study showed. On a 30-second task measuring simple reaction time, moderate-to-severe cognitive slowing ...