ජාපනෙ ටොකියො යුනිවසිටි එකෙ පරික්ශනයක් හිරු එකෙ පෙන්නුවා එකට අනුව කිබුමක් ගියොත් මිටර් 5 - 10 ක් උනත් එහාට පැතිරෙන්න පුලුවන්
FYI.. A sneeze is considered be a most violent body function. It's said that particles can be ejected at a velocity of 100 - 600 mph.
I would resort to the low end mostly. Even then 1m distance is nothing.
The virus isn't intelligent enough to travel a preset distance. As I said before a lot depends on the ambient temperature and the RH.
I saw a joke somewhere that if you can smell a fart, then you are not far enough from the other person to get infected with Covid.