会話1分で ウイルス含む飛沫が数千

tomojiroさんがリツイート

こういう基礎的なこともようやくわかってきている段階👶3密のリスクを裏付けていくことになるよね。
ウイルス含む飛沫が千個　空気中浮遊、会話1分で | 2020/6/4 - 共同通信 https://t.co/L1HmaRdtnA

— 峰　宗太郎 (@minesoh) June 4, 2020

Abstract

Speech droplets generated by asymptomatic carriers of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are increasingly considered to be a likely mode of disease transmission. Highly sensitive laser light scattering observations have revealed that loud speech can emit thousands of oral fluid droplets per second. In a closed, stagnant air environment, they disappear from the window of view with time constants in the range of 8 to 14 min, which corresponds to droplet nuclei of ca. 4 μm diameter, or 12- to 21-μm droplets prior to dehydration. These observations confirm that there is a substantial probability that normal speaking causes airborne virus transmission in confined environments.

今後、キャバクラはホストクラブは手話か筆談だな。