Notably, there was a gradual increasing trend in positivity rates of HCoVs (predominantly HCoV‐OC43 and HCoV‐229E) from fall 2021 to winter 2022 with December 2021 to February 2022 being the months with more reported cases, and a decreasing trend from spring 2022 to late summer 2022 suggesting seasonality for HCoVs.
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Surveillance of endemic coronaviruses during the COVID-19 pandemic in Iran, 2021-2022.
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