do you get sick often?

[soundtest]

i never used to, but this year for some reason it feels like i get a cold every other week. i'm sick right now and it's probably the third cold i've had since december. it's probably my diet because all i eat is garbage (no fast food, just nothing substantial because i'm too lazy to cook). what can i do to strengthen my immune system other than cure my AIDS? being sick sucks am i right