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Before, for people indoors, I'd have suggested doing three out of: open windows; masks; short meeting (<20 minutes); >2m. Each cuts down the levels of virus in the air around five-fold. Now I'd suggest all four to be safe. Previous thread: https://twitter.com/adsquires/status/1315720942354657283?s=20
Before I'd have said outdoors completely safe ("1m plus"); now I'd make sure to stay 2m away or wearing a mask if sitting outside talking to someone. But going for a walk together still safe.
Also, no more likely to survive on surfaces (same lipids and RNA) - so still low risk. (Since more known about airborne infection, infection from surfaces considered much less of a risk than previously thought; very few documented cases of infection through surfaces)
Note: previous "COVID-safe" precautions in restaurants (sanitiser, distance, visors, perspex screens) were never safe for airborne viruses, without good enough ventilation; they were based on what was known at the time, but guidance and messaging needs to change.
