Not but having sex does release endorphins which, make you feel a lot better just based on chemical releases. It won't cure any illness though just make you feel more elated for a small while.
Itchi is right. It depends on what you have. Generally when you have the flu it isn't good, because sex = exercise and exercise isn't good when you've got the flu.Does having sex really help make you feel better?
Not necessarily, but it depends on what the illness is.
It can help with headaches, because it relieves stress, but I don't recommend trying it when you have the flu.Does moaning make it better?