Here are some of HealthDay’s top stories for Thursday, Sept. 23:

FDA approves Pfizer booster shot for seniors, high-risk folks: Under the emergency use authorization, the booster shots should be given at least six months after a person is fully vaccinated. The move is likely the beginning of a staggered campaign to deliver booster shots to all Americans. Read more

Could llama antibodies fight COVID? British researchers report in early research that these “nanobodies,” a smaller, simpler form of antibodies, could be produced in a lab and deployed in a nasal spray, binding tightly to the coronavirus and neutralizing it. Read more

Your kid hates broccoli? Your genes may explain why: That dislike for broccoli and other veggies in the same family may be inherited, a new study suggests. Read more

Dairy foods not unhealthy after all: People who consumed more dairy fat actually had a lower risk of heart disease than those who drank or ate less dairy, a new study revealed. Read more

Meth overdoses triple in recent years: Frequent use of the illegal stimulant, along with other drugs at the same time, may have fueled the troubling trend, a new report suggests. Read more