-- Members of the U.S. military who were vaccinated against COVID-19 showed higher-than-expected rates of heart inflammation, although the condition was still extremely rare, according to a study released on Tuesday.
A majority of U.S. adults are concerned about the delta coronavirus variant but have not significantly changed their behavior because of it, according to the Axios-Ipsos Coronavirus Index.
A mixed schedule of vaccines where a shot of Pfizer's Covid-19 vaccine is given four weeks after an AstraZeneca shot will produce better immune responses than giving another dose of AstraZeneca, an Oxford study said on Monday.
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