Effectiveness of COVID-19 Vaccines in the General Population of an Italian Region before and during the Omicron Wave.

Vaccines (Basel) · 2022 · PMC9146679 · PMID 35632418

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highly significantno p-value reported

In contrast, during the Omicron wave ( Table 3 ), and after six months from the last vaccine dose ( Table 4 ), the effectiveness of two doses decreased to approximately 66% and 69%, respectively, although remained highly significant. 3.3.

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