Social restrictions during the COVID-19 pandemic strongly affected the epidemiology of influenza and respiratory syncytial virus (RSV). As rhinovirus seemed to spread despite the restrictions, we aimed to analyze rhinovirus epidemiology in children during the pandemic.
This register-based study used data from the Finnish Infectious Disease Register. Nationwide rhinovirus findings from July 2015 to March 2021 were included and stratified by age (0-4, 5-9, and 10-14). Cumulative 14-day incidence per 100000 children was calculated.
4576 positive rhinovirus findings were included, of which 3788 (82.8%) were among children aged 0-4. The highest recorded incidence was 36.2 among children aged 0-4 in October 2017. The highest recorded incidence during the pandemic period was 13.6 in November 2020. The impact of the restrictions was mostly seen among children aged 0-4 years of age in weeks 14 to 22 in 2020. The incidence has since remained near reference levels in all age groups.
Strict restrictions temporarily interrupted the circulation of rhinovirus in spring 2020. Rhinovirus incidence returned to normal levels soon after the harsh restrictions were lifted. These looser social restrictions prevented RSV and influenza seasons but failed to prevent the spread of rhinovirus. This article is protected by copyright. All rights reserved.

This article is protected by copyright. All rights reserved.

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