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Masks prevent direct exposure of aerosols and a proper ventilation system in combination with a good air filter reduces covid-19 infection risk by 40 to 50%.
from Medindia Health News https://ift.tt/39LEolU
Masks prevent direct exposure of aerosols and a proper ventilation system in combination with a good air filter reduces covid-19 infection risk by 40 to 50%.
from Medindia Health News https://ift.tt/39LEolU
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