COVID-19 may be new, but viruses and infectious diseases certainly are not. We’re obviously going to learn more and more about coronavirus as the days and months drag on, but one thing is probably certain: we’re not going to cure it, and it’s not going to go away. That means our immune system will be called upon, once again, to bail us out. To bail us out, our immune system needs some exposure to the menace to start building the antibodies we need to fight it. The more this thing spreads, the more we’ll be able to build up…

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