Just practice usual anti-flu measures
There is no need for masks to protect from corona virus. Don't get caught up in the frenzy and help make some scalper a lot of money, selling overpriced masks.
Just do an Internet search, and find plenty of advice from experts on the futility of masks.
They are mainly of benefit for people such as health car workers who are attending patients. Or for people already infected, to prevent spread.
The BEST thing to do is just practice good health habits that are already recommended for the flu season.
Clean and disinfect frequently touched surfaces at home, work or school, especially when someone is ill. Get plenty of sleep, be physically active, manage your stress, drink plenty of fluids, and eat nutritious food. Regular hand washing.