Published 20 November 2021 at 10.49
Abroad. Wearing respiratory protection is the most effective infection control measure to reduce covid-19 cases, according to a meta-study published in the British Medical Journal, BMJ.
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The incidence of covid-19 is reduced by 53 percent when using a mouth guard, a clearly higher result than other measures.
In one of the studies included in the meta-study, the success of infection control measures in 200 countries. Mandatory use of masks reduced covid-19 problems by nearly half, according to that study.
In a US study, the spread of infection was reduced by 29 percent in the states that introduced the requirement to wear masks.
< Researchers say new studies are needed to determine how effective respirators are with or without vaccines.