Have had it a couple of times. It's only a problem if you don't get any medication to get rid of it. It doesn't go away on its own easily. Otherwise its like a

Have had it a couple of times. It's only a problem if you don't get any medication to get rid of it. It doesn't go away on its own easily. Otherwise its like a flu.. You would have to stay ill for weeks for it to start becoming life threatening. Keep in mind the immune system can't easily fight it on its own so its not like the flu in certain ways. Having 'semi immunity' only means you don't get it as bad as it can be, but you still get ill.