Pathogens such as viruses spread along chains of infection – from infected person to new host. The only certain way to stop the spread of a virus such as Covid-19 is to break as many of those chains as possible. To starve the virus of new hosts.
The only way to break the chains of infection and starve the virus of new hosts is to isolate potential new hosts from potentially infected person. When there is no way to easily and reliably tell whether a person is infected or infectious then this means isolating every individual from every other individual. If no two individuals in a population come into contact or proximity, the virus cannot spread. There are no chains of infection along which it can travel.
The more breaks in the chain there are, the less chance there is of anyone becoming infected. None of us has any way of knowing if we are on a chain that has been broken at some prior point.
The only way to be certain that the chain is broken is to be the break.
Will you be a link in a chain of infection? Or will you be a break?
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