26 May 2020 – Policy Brief
We conducted a rapid reviewof the literature to address the following two questions: (1) What is the role of the climate in the transmission of SARS-CoV-2? (2) To what extent could seasons in Switzerland affect the spread of the virus? We searched the living evidence database for COVID-19 of the Institute of Social and Preventive Medicine (ISPM) of the University of Bern for relevant studies. We screened 92 publications and included 7 modelling studies, 7 analyses of epidemiological data, 1 systematic review and 1 narrative review. There was broad agreement among studies that season and climatic factors play a role in the transmission of SARS-Cov-2 and the propagation of the COVID-19 epidemic. However, the mitigating effect of higher temperatures / the summer season will be modest and insufficient to control the epidemic.