Home, bars, restaurants… A comprehensive French study led by epidemiologist Arnaud Fontanet, a member of the government's Scientific Council, identifies the highest-risk locations for COVID-19 transmission.
In a November study published in Nature, researchers tracked movements of 98 million Americans during the first wave to pinpoint high-risk venues like restaurants, cafes, gyms, hotels, and religious sites. That analysis focused on the U.S.—but what about France?
To answer this, Arnaud Fontanet interviewed more than 25,000 French individuals infected with the virus. The findings, forthcoming and previewed by Europe 1, offer critical insights into transmission patterns.
The top contamination site? The home, accounting for two-thirds of cases, often through spouses or children—especially during shared meals.
Beyond the household, risks rise with extended family, workplace colleagues, and friends—settings where masks are less commonly worn.
Frequenting restaurants, bars, and gyms also elevates infection risk, aligning with U.S. findings. Conducted partly during lockdown, the study notes many bar and restaurant cases likely stemmed from "clandestine gatherings."
Notably, shopping does not increase COVID-19 risk.
A key insight: 94% of participants isolated too late. Transmission peaks in early illness, often presymptomatically.
Most affected professions include salespeople, healthcare workers, administrative staff, manual laborers, and drivers. Teachers faced lower risks.
