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Deprecated: Implicit conversion from float 219.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Proc+Natl+Acad+Sci+U+S+A 2020 ; 117 (22): 11875-11877 Nephropedia Template TP
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The airborne lifetime of small speech droplets and their potential importance in SARS-CoV-2 transmission #MMPMID32404416
Stadnytskyi V; Bax CE; Bax A; Anfinrud P
Proc Natl Acad Sci U S A 2020[Jun]; 117 (22): 11875-11877 PMID32404416show ga
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 mum diameter, or 12- to 21-mum droplets prior to dehydration. These observations confirm that there is a substantial probability that normal speaking causes airborne virus transmission in confined environments.