Prognosis
Covid Survivors May Require Just One Shot of a Two-Dose Vaccine
- Findings take on added urgency with J&J, AstraZeneca issues
- European countries make it policy, but U.S. awaits more data
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Coronavirus vaccines were just rolling out in December when more than 1,000 staffers at Cedars-Sinai Medical Center in Los Angeles volunteered for a sweeping study. The goal: pinpoint how immune reactions to the jab might vary.
By last month, a clear pattern in the data “popped out at us,” said research leader Susan Cheng. Those who had recovered from Covid-19 responded to their first shot so robustly that the results rivaled never-infected colleagues who had received both shots. The implication was clear. If you’ve had Covid, you may only need one of the two doses recommended by Pfizer and Moderna.