[Taf]

Figures plucked out of thin air:

1 cough or sneeze at 2 metres could give you the dangerous viral load in seconds.

Talking loudly at 2 metres could give you the dangerous viral load in a few minutes.

Normal breathing at 2 metres could give you the dangerous viral load in an hour.

So stay away from people who are coughing and sneezing. Don't stay close to people in loud environments where shouting is necessary to communicate. Don't linger with people for extended periods, even if they show no symptoms.

And remember that the viral load doesn't have to come from one person. 100% from one person or 10% each from 10 people will do it.