Over a year into the COVID-19 pandemic, vaccines are rolling out and it feels as if there’s finally a light at the end of the tunnel. For many Americans, however, there is still a bit of a wait before they can receive their shot, depending on the state they live in. As we strive to stay healthy while the country works towards building herd immunity, it s natural to want to look for ways to bolster your immune system’s defenses. Perhaps, for example, you may have heard claims that vitamin D could help combat COVID-19 (the jury is still out on that one), or maybe you’ve stayed up late Googling the benefits of probiotics. But is it even possible to truly boost your immune system? And if so, how? To start with, it helps to understand the basics of how the immune system works.