"Healthy" isn't something that's immediately obvious, and it's entirely possible you're not as healthy as you think. I was running half marathons with undiagnos

"Healthy" isn't something that's immediately obvious, and it's entirely possible you're not as healthy as you think. I was running half marathons with undiagnosed stage 4 kidney disease, which by the classification we had in Canada, would have put me at the highest risk for severe outcomes of COVID.