Common cold
When I was a seafarer No one got the cold or the flu
on long voyages, it was only when the ship birthed
and official people came onboard we all went down
with cold/flu.
When this current pandemic pans out, we who have
been sitting in for weeks will be susceptible to other
illnesses that come along  
our immune system has been weakened and we will
catch anything so hard we may die from a public cold.
Eskimos died by the hundred when the white man
came to safe them for Christianity.