Bedding can be easily contaminated with germs, which is particularly true with two people sleeping in a bed! This can of course be a source of infection and is an excellent environment for germs to cultivate, spread and infect.
This is particularly true when a person is recovering from an illness. The process of recovery is called convalescence, and it is a period where our immune systems are in an active recovery phase, so it still regaining strength but is more vulnerable.
This is a prime time for reinfection, so is a great to be on top of cleaning habits, particularly when it comes to laundry and care for our bedding. If someone is known to be recovering from an illness, then isolate the wash for clothes and bedding to avoid contamination.