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A rapid, two-step immune reaction may underlie rare cases of heart inflammation seen after COVID-19 mRNA vaccination, Stanford University researchers found, shedding light on a mechanism that’s fueled scientific debate and political controversy since the pandemic.
The National COVID Memorial Wall was established without official authorization on a more-than-a-quarter-mile stretch of the Albert Embankment in March 2021.
A wave of the highly contagious respiratory syncytial virus is beginning to wash over the United States, sending greater numbers of babies and toddlers to the hospital for professional care.
The most widely used COVID-19 vaccines may offer a surprise benefit for some cancer patients by boosting their immune systems to help fight tumors.
Recent California COVID-19 Deaths
Are vaccines safe? When can I get a booster dose? Do I have to wear a mask? We’ve answered hundreds of newsletter readers’ questions. Here’s an archive.
