[mike_d]

The theory is Wuhan Flu (there are actually a large number of "coronaviruses") is contagious before symptoms show, which is why it is so effective at spreading.

Preventing the spread basically comes down to avoiding people. I'm not sure that is great advice. The rest of this site is just things people should be doing anyway like washing their hands.

[imlina]

If you suspect that you were exposed to coronavirus or have it but are suffering from the milder symptoms, you should proactively self quarantine if you live with others, and wear a mask in public to avoid infecting others.