Covid-19 crisis Why are some people not infected by a close contact?
We pay a lot of attention to the transmission of the virus from an infected person to another person.

However, we are not paying attention to the non-transmission of the virus.

What do I mean?

If an infected person transmit the virus to another person in the same household, why are the other persons in the same household, who have the same exposure, not infected?

If we pay attention to the uninfected people, who have similar exposures, we may learn something about the resistance to the transmission.

Perhaps, a study can be carried out on the people in these households.

Tan Kin Lian

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