If you didn’t have a functioning immune system, simply brushing your teeth would introduce enough harmful bacteria into your bloodstream to kill you. Luckily, your immune system protects you from these, everyday bacteria.
Sight unseen, your immune system cells are constantly gobbling up bacteria and blocking viruses from invading your cells. Like your heartbeat or your digestion, the immune response is a function you don’t control. But there are plenty of things you can do to lend a helping hand.
1. Good hygiene. The first line of defense is to keep germs at bay by following good personal hygiene habits. Stop infection before it begins and avoid spreading it to others with these easy measures: