Nasopharyngeal Testing among Healthcare Workers (HCWs) of a Large University Hospital in Milan, Italy during Two Epidemic Waves of COVID-19.

Int J Environ Res Public Health · 2021 · PMC8392643 · PMID 34444497

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an increasing trendno p-value reported

No major variations of positivity according to age were found in the 1st wave, while in the 2nd wave there was an increasing trend with increasing age.

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