Dr. Jenna Macciochi is the author of Immunity: The Science of Staying Well-The Definitive Guide to Caring for Your Immune System.
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The immune system is our first line of defense against the hordes of microbes that threaten us constantly. Just like our heart and our lungs, it works around the clock to keep us alive-and with the advent of coronavirus, no one can take it for granted. Im... SEE MORE