The US Centers for Disease Control and Prevention has extensively updated its ventilation guidance on helping prevent indoor transmission of the virus that causes Covid-19.The agency had advised people to ventilate indoor air before, but this is the first time a federal agency has set a target five air changes per hour for how much rooms and buildings should be ventilated.
#people #years #potentially #recommendations #disease-control #world-health-organization #effectiveness #transmission #infectious-diseases #public-health-officials
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