Gabriella Emanuel

One big factor driving the surge is a new strain called subclade K.

It's caused huge numbers of cases from Australia to Japan to the U.K.

Florian Kramer of the Eichen School of Medicine at Mount Sinai says genetic changes in the strain mean the flu vaccine isn't great at recognizing the virus.

However, early data from the UK suggests that the vaccine is still quite effective at keeping people from getting so sick they end up in the hospital.

And the new strain doesn't seem to be more severe or dangerous.

And researchers say current treatments still work against it.

Gabriela Emanuel, NPR News.

Worldwide, obesity affects over 1 billion people, and that's projected to rise to 2 billion by 2030.

Francesca Ciletti is with WHO and co-authored the guidelines.

The guidelines say it's critical that GLP-1s are part of a broader medical plan, including physical activity and management of chronic diseases linked to obesity.

They also call for equitable access to GLP-1s that prioritizes those with the highest need, as well as more research on long-term use and safety.

Gabriela Emanuel, NPR News.

It's NPR.