The well-proven shots that are not large-scale #clinicalTrials and are generally very effective (old people here are advised to take these before winters) https://www.nytimes.com/2021/09/17/us/flu-shot-covid.html
The well-proven shots that are not large-scale #clinicalTrials and are generally very effective (old people here are advised to take these before winters) https://www.nytimes.com/2021/09/17/us/flu-shot-covid.html
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