Washing your hands, wearing masks, disinfecting surfaces, and social distancing are the first-line methods to protect yourself against the coronavirus that causes COVID-19. But you don’t have to stop there. You can also keep yourself and your family as healthy as possible by boosting the body’s immune system in scientifically proven ways. 1. Go big on micronutrients The immune system depends on an abundant supply of vitamins and minerals, also called micronutrients.