❦ ‘Respiratory infections occur through the transmission of virus-containing droplets (>5 to 10 µm) and aerosols (≤5 µm) exhaled from infected individuals during breathing, speaking, coughing, and sneezing.

Traditional respiratory disease control measures are designed to reduce transmission by droplets produced in the sneezes and coughs of infected individuals.

The U.S. Centers for Disease Control and Prevention (CDC) recommendations for social distancing of 6 feet and hand-washing to reduce the spread of SARS-CoV-2 are based on studies of respiratory droplets carried out in the 1930s.

However, a large proportion of the spread of coronavirus disease 2019 (COVID-19) appears to be occurring through airborne transmission of aerosols produced by asymptomatic individuals during breathing and speaking.

Aerosols can accumulate, remain infectious in indoor air for hours, and be easily inhaled deep into the lungs.’

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📖 (27 May 2020 ~ Science) Reducing transmission of SARS-CoV-2 ➤

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