Yes mine will sleep a lot when sick!I’ll generally let him sleep for as long as he needs to (compared to capping his day naps when not sick)
Yes mine was doing 2 x 2 hour naps when she was sick- double the normal amount!
Yes when my LB had a sickness bug he slept most of the day and night for 3 days, his sickness bug lasted 10 days. Each day after the 3rd day he would sleep less but it really took it out of him.
Yes. Sleep helps them fight off germs/ bugs, the same way when we’re poorly we want to rest and sleep. I wouldn’t cap naps etc but make sure baby is at least drinking if they’re not up to much food regularly so they don’t get dehydrated even if they only wake for a drink and want to snooze again. Obviously if they’re hard to rouse/ you’re worried go back to the GP x