NBC News @NBCNews
Pfizer-BioNTech's updated booster shot generates a stronger immune response against the omicron subvariants BA.4 and BA.5 compared with the original Covid vaccine, the companies say. https://t.co/HKTFTFM4eC — PolitiTweet.org
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NBC News @NBCNews
Pfizer-BioNTech's updated booster shot generates a stronger immune response against the omicron subvariants BA.4 and BA.5 compared with the original Covid vaccine, the companies say. https://t.co/HKTFTFM4eC — PolitiTweet.org