I Just Got Boosted. Why Did I Catch Covid?

Hi folks, it’s Kristen, writing from my sunny homeland of Orange County, California, where my whole family is frantically Covid testing before a cousin’s wedding. As we enter sniffle season, I’ve been fielding lots of questions on the best ways to avoid getting sick and why Covid can sometimes evade our defensive measures. But first...

I dodged Covid for 2.5 years and got my bivalent booster in September. Now I have Covid. How is that possible? Is it possible to know what variant I have? Dana, California