Which Covid-19 Booster Shot Is Best?

How to choose and whether to mix and match

Image: Pixabay

Update December 16: The U.S. Centers for Disease Control and Prevention today recommended Moderna and Pfizer over the Johnson & Johnson vaccine for most adults, due to the risk of blood clots in the J&J vaccine. The J&J vaccine will still be available for people “unable or unwilling” to get either of the other shots, the agency…