Summary
Respiratory infections can be transmitted through droplets of different sizes: when the droplet particles are >5-10 μm in diameter they are referred to as respiratory droplets and when they are <5μm in diameter they are referred to as droplet nuclei. According to current evidence, COVID-19 virus is primarily transmitted between people through respiratory droplets and contact routes. In an analysis of 75,465 COVID-19 cases in China, airborne transmission was not reported.
Content
This version updates the 27 March publication by providing definitions of droplets by particle size and adding three relevant publications.
WHO: Modes of transmission of virus causing COVID-19: implications for IPC precaution recommendations – UPDATED
https://www.who.int/news-room/commentaries/detail/modes-of-transmission-of-virus-causing-covid-19-implications-for-ipc-precaution-recommendations
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