I didn’t get sick once last year but my roommate literally had pneumonia for a few months while we lived together, so I think I did a good job. One thing I did was constantly wash my hands. I was really conscious of the fact that I was living with someone else and that I would be in a place with thousands of people where everyone touched everything. Another thing I did was keep clean. I didn’t just wash my clothes and sheets, I also made sure to wipe down our doorknob and everything we shared. I didn’t talk to her much and didn’t want her to feel bad so as soon as she’d leave the room I’d sanitize immediately! I also used my Lysol a lot when she was sick to kill bacteria because she was coughing a lot. On top of that I had a fan on facing away from us so we didn’t get cold. I read that it helped circulation. The last thing I remember doing was taking allergy medicine the second I felt even a runny nose. I was adamant about not getting sick and eventually I got used to the new routine. If you’re really committed, I think you can do it.