NOTE: I am not a doctor or a care giver. You should take professionals advice than a random person like me.
1. I try to weak a mask if someone else has the flu at home. Better still make the person at home with flu to weak a mask and I mask up myself for three to four days.
2. Another thing I use to do is wash my nose, cheeks and throat with Lifeboy handwash every three to four hours, surprising that is really effective even if I have caught the flu.