Don't mix and match

2. Mixing and matching vaccines might be OK, but experts counsel patience. The Centers for Disease Control and Prevention discourages J&J recipients from getting a booster of another vaccine. Earlier guidance from the CDC said in situations where the first dose was received but the patient could not complete the series with the same vaccine, consideration can be given to vaccination with a J&J vaccine, under the supervision of a health care provider.

“I think most of us in the medical community feel that that really shouldn’t be done unless you absolutely have to,” Hewlett said. “You will get the maximum benefit,” he added, “if you use a product that is identical to the first product that your body was exposed to.”