14 days you should leave the bed alone for
Pubic lice can live less than a day without a human host.
Adult bed bugs can live for as long as a year without feeding,[18] under typically warm conditions
Months
Without a host a fleas life is only a few days. (When provided a host for ample food their life can span over 100 days.)
If you are asking if a virus can live very long without its host, then no. Viruses aren't alive in the first place. Because viruses can't reproduce on their own, they are not considered living organisms. Because they aren't living to begin with, they cannot die.
2-3 years
2 days
There are no known bugs that live in lungs. It is possible for a short period of time one could survive in a lung though not for long.
as long as you want~!
2 to 3 weeks
Cicadas usually have a live span ranging from 13 to 17 years.
Tapeworms can live in a host for 5-10 years.