SARS-CoV-2 stays airborne & accumulates indoors, so🇩🇪German government is betting on ventilation.

✔️Help to schools for air purifiers;
✔️Grants to improve ventilation systems in buildings;
✔️Deploy CO2 sensors to tell how stale the air in a room is.

https://bbc.in/2FSCVyb 
Germany's guidelines to tackle the virus, encapsulated in the acronym AHA, which stands for distancing, hygiene and face coverings, will be extended to become AHACL. The “C” stands for the government’s coronavirus warning app, and “L” for Lüften or airing a room.
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