Waning infant pertussis during COVID-19 pandemic.

Falkenstein-Hagander, Kathy; Appelqvist, Emma; Cavefors, Ann-Sofie Frisk; Källberg, Henrik; Nilsson, Lennart Jan; Silfverdal, Sven-Arne; Storsaeter, Jann; Aronsson, Bernice · Arch Dis Child · 2022

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Abstract

Measures to reduce the spread of COVID-19 have been associated with reduction in other respiratory infections. Results of a national Swedish cohort study of infant pertussis during April 2020-September 2021 were compared with those during January 2014-March 2020. The number of pertussis cases decreased significantly during the COVID-19 pandemic, from an average of 21 infant cases per quarter of a year before the pandemic to an average of 1 case per quarter during the pandemic. Swedish strategies to mitigate the spread of COVID-19 seem to have had an impact on pertussis incidence in infants.

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