Covid-19 Vaccine Boosters Without Data Raises Safety Questions

July 13, 2021, 4:54 PM

Fully vaccinated people pursuing an additional Covid-19 shot ahead of any recommendations that it’s necessary may face an increased risk of rare, dangerous side effects.

Pfizer Inc. on Monday met with top health officials on its plans to seek emergency use authorization for a booster shot as Covid-19 infections trend upward and the delta variant continues to gain steam. There is no recommendation for booster shots at this time, and health leaders maintain the available vaccines protect against the original strain of the virus and all of its mutations.

“The COVID vaccines are so immunogenic that there is actually a ...

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