One alternative: NIH is currently recruiting for a clinical trial to assess the effectiveness of booster doses. Among other requirements, enrollees must not have had a known COVID infection and must have been fully vaccinated at least 12 weeks prior to enrollment. https://clinicaltrials.gov/ct2/show/NCT04889209
One alternative: NIH is currently recruiting for a clinical trial to assess the effectiveness of booster doses. Among other requirements, enrollees must not have had a known COVID infection and must have been fully vaccinated at least 12 weeks prior to enrollment. https://clinicaltrials.gov/ct2/show/NCT04889209