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How long after an IgG infusion should I wait to receive my third (booster) shot of the Pfizer vaccine?

Ask the Doctor Question:

Recent blood tests determined I did not produce any antibodies from the first two vaccine shots I received, the last of which was 3/11/2021. My recent IgG test was down to 382.  I am scheduled for an IgG infusion on 8/27/2021.  How long after this infusion should I wait to receive my third (booster) shot of the Pfizer vaccine?

Answer:  We double checked your answer with several other CLL specialists. The answer to your question is that it probably makes very little difference, but the general recommendation has been to wait 3-4 weeks after the infusion to get the COVID-19 vaccine.