Re: Coronavirus
That's the nature of arbitrary definitions though. 30 miles per hour in the car doesn't magically improve safety in a built up area over 31mph.
In air conditioned environments the virus has been shown to infect people six metres away, and infecting people entering in area up to 30 minutes after the originally infected individual has left. It's be unrealistic to make that a definition though off the back of one isolated example.
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