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Friday, October 23, 2026

'The days you were considered fully vaccinated with two shots are going to be a thing of the past' - MarketWatch

Is three going to be the new two?

With employer vaccination requirements already widespread, workplace experts say it’s possible some companies will convert their full vaccination requirement, now two shots, into a three-shot requirement as the omicron variant emerges.

Pfizer PFE, +1.34% and BioNTech BNTX, -9.33% said three of its vaccine doses can “neutralize” the omicron variant, while two doses may not be enough to prevent infection, according to very early-stage results released Wednesday.

The vaccine makers emphasized the results come from preliminary laboratory studies. That echoes public health officials like Dr. Anthony Fauci, President Joe Biden’s medical adviser, who say early news may be encouraging, but it’s still very early in the process of understanding omicron’s threat.

“I think the days — at least for Pfizer and Moderna — the days you were considered fully vaccinated with two shots are going to be a thing of the past,” said Christopher Feudo, a partner at the Boston-based law firm Foley Hoag representing management in employment law matters.

Even before omicron’s rise, Feudo had been fielding calls from clients curious about whether they could require their employees to get boosters too. “I say yeah, why not?”

The same legal leeway that allows companies to institute vaccination requirements at all should also let them alter the requirements to three shots, Feudo said. To his knowledge, none has followed through with a booster requirement yet, but he...



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