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‘Science is just not there yet’ for a Pfizer booster shot, doctor says

02:18

Joining TODAY to comment on the news that Pfizer is developing a third-dose booster shot targeting the delta variant, NBC News medical contributor Dr. Vin Gupta says, “If you are immunocompromised … you will need a booster shot.” But, he adds, “for the rest of us, the science just is not there yet.”