Masks reduce airborne transmission
Infectious aerosol particles can be released during breathing and speaking by asymptomatic infected individuals. No masking maximizes exposure, whereas universal masking results in the least exposure.
https://www.science.org/doi/full/10....cience.abc6197
The authors thank S. Strathdee, D. Petras, and L. Marr for helpful discussions. K.A.P. is supported by the NSF Center for Aerosol Impacts on Chemistry of the Environment (CHE1801971). R.T.S. is supported by the National Institute of Allergy and Infectious Diseases (R01 AI131424). C.C.W. is supported by the Ministry of Science and Technology (MOST 108-2113-M-110-003) and the Higher Education Sprout Project of the Ministry of Education, Taiwan, ROC.
В комменариях есть мнение с которым полностью согласен
Цитата:
Kar Keung Cheng
Public health physician University of Birmingham, UK
Most people practise the trio of social distancing, hand washing and cough etiquette religiously but many still do not believe that wearing mask is helpful. Comparing these interventions,
● All aim at preventing infections arising from droplets.
● Mask is a form of source control. Social distancing and hand washing are mitigative. In public health, source control takes precedence.
● Though clinical trial evidence on all of them is either poor or non-existent, all four are based on sound scientific and mechanistic principles
● Masks act on a continuous basis. No one can wash their hands every 10 minutes. And to reopen social distancing has to relax.
National authorities in 90 countries and august bodies such as the Royal Society in the UK have recommended mass masking in the community when we exit from lockdown. Sceptics on masks think that they are all wrong. It is possible - there are many examples in the history of science and public health where experts and authorities made erroneous judgements. If they are indeed wrong on masks, we would have wasted our time wearing them but there are little serious harms. However, if they are correct and we ignore the advice, the consequences are far more serious. Asymptomatic transmissions is an important driving force behind this pandemic. Also, <10% of cases may be responsible for 80% of secondary cases. Masking is an important tool that would help to limit the number of cases arising from these two features.
Ignoring masks is illogical as we reopen for business. If you still think it is not worthwhile, try staying in lockdown.
