How to Avoid Sickness?

I’ve been kissed on the cheek by a family member who is sick. I don’t know what she’s sick with but she decided to come to her son’s Christmas chorus concert and went home from work. I washed my face and took a hot shower as soon as I got home. I took my vitamins, too.

I have finals this week and cannot be sick or I fail the semester. My boyfriend also had surgery last week and I cannot get him sick, either.

I cannot exercise and “sweat it out” because I’m currently recovering from terribly pulled muscles and inflammation.

Please, I need to know how to avoid sickness. I’m a very paranoid person and I have been through too much this year to handle feeling like crap an extra few weeks.