Well, today the CDC put out new guidance that could make it harder for a lot of kids and adults to get an updated CO 19 booster this season. In fact, people younger than 65 are now recommended to consult with a doctor or even a pharmacist before getting their vaccination. But experts warned that this change could limit access to the shot and compromise herd immunity in states that follow this new recommendation.Joining us now for more clarity, NBC News health and medical reporter Erica Edwards. Erica, what ...