Association of age with likelihood of developing symptoms, critical disease among close contacts exposed to patients with confirmed SARS-CoV-2 infection

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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Editor’s Note:

The article includes conflict of interest and funding/support disclosures. Please see the article for additional information, including other authors, author contributions and affiliations, conflict of interest and financial disclosures, and funding and support.

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About JAMA Network Open:

JAMA Network Open is the new online-only open access general medical journal from the JAMA Network. On weekdays, the journal publishes peer-reviewed clinical research and commentary in more than 40 medical and health subject areas. Every article is free online from the day of publication.