The key is...your immune system

No matter what virus is behind the infection, the only people who die are the ones whose immune systems are defective. For the most part, this includes young children, old people, and sick people. But it also includes anyone with an unhealthy lifestyle. So the key to preventing flu infections should be pretty obvious – keep your immune system healthy. You can't do this with a vaccine, but you can do it with what God has already provided us.