Jones NR, Qureshi ZU, Temple RJ, Larwood JP, Greenhalgh T, Bourouiba L, et al. Two metres or one: what is the evidence for physical distancing in covid-19? BMJ 2020; 370 :m322. (2020-08-25). https://doi.org/10.1136/bmj.m3223
Key messages
Current rules on safe physical distancing are based on outdated science
Distribution of viral particles is affected by numerous factors, including air flow
Evidence suggests SARS-CoV-2 may travel more than 2 m through activities such as coughing and shouting
Rules on distancing should reflect the multiple factors that affect risk, including ventilation, occupancy, and exposure time