Personal action: wear a well-fitted N95 or equivalent indoors whenever possible, and get up-to-date Covid vax boosters the same way you get a flu vax booster.
Public and corporate action: invest in HVAC upgrades and air filtration systems everywhere possible.
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Replying to @EpsilonTheory and @TristanCPDT
What would you suggest then? Germany's population is fully vaccinated, or nearly so.
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