If you take any daily vitamins especially for immunity what do you take?

I need to start something asap cause between my school aged kid, and my husband who works in a office, they're always bring something home and I get hit with it hard! I'm usually rarely sick except for a seasonal cold, but this winter something is hitting me back to back. My immunity has got to be struggling at this point. I'm just so done being sick what seems to be all the time!!