What The Study Did: In a study of Italian close contacts of patients with confirmed SARS-CoV-2 infection, most infected contacts (1,948 of 2,824 individuals or 69%) didn't develop respiratory symptoms or fever 37.5 degrees Celsius (99.5 degrees Fahrenheit) or higher; 26.1% of infected individuals younger than 60 developed respiratory symptoms or fever 37.5 degrees Celsius (99.5 degrees Fahrenheit); and 6.6% of infected participants age 60 or older developed critical disease.
Authors: Piero Poletti, Ph.D., of Fondazione Bruno Kessler in Trento, Italy, and Marcello Tirani, M.D., Directorate General for Health, Lombardy Region, in Milan, Italy, are the corresponding authors.
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(doi:10.1001/jamanetworkopen.2021.1085)
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