![Preliminary lab studies show two doses of the Pfizer/BioNTech vaccine may not provide sufficient protection against the Omicron coronavirus variant](https://abc17news.b-cdn.net/abc17news.com/2021/12/hypatia-h_5404d53d27184a6fc21e6dbb153a167a-h_f242dc804de721adf27fac968e12d311-300-375x225.jpg)
Protection against Omicron coronavirus variant improves with three vaccine doses, Pfizer says
By Jamie Gumbrecht, CNN Preliminary lab studies show two doses of the Pfizer/BioNTech vaccine may not provide sufficient protection against the Omicron coronavirus variant, but three doses are able to neutralize it, the companies said in a news release on Wednesday. Samples from people who had two doses of the Covid-19 vaccine saw, on average,
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