Modes de transmission du SARS-CoV-2 : que sait-on actuellement ?

Large progresses have been made in our understanding of the transmission of SARS-CoV-2 and the reduction of its spread. The consideration of the major risk of asymptomatic cases by the universal face masking is one of these advances. Epidemiological data (attack rate and R0) as well as the accumulation of data in clinical context suggest a similarity of transmission of SARS-CoV-2 with that of other respiratory viruses such as influenza or SARS-CoV-1: a primary direct person-to-person mode of transmission at short range by droplets. Airborne transmission is possible but rare, and appears to occur only under opportunistic circumstances, particularly during procedures on the respiratory tract of infected patients, or under conditions of high viral excretion in a poorly ventilated environment. Hand hygiene and facemask wearing are the two main prevention measures in the context of COVID-19.