A vaccine from Pfizer showed the potential to protect adults ages 18 to 59 who are at increased risk of getting severely sick from respiratory syncytial virus in a late stage clinical trial, the company said Tuesday. The initial data suggests that Pfizer's shot, known as Abrysvo, could help protect a far wider population from RSV. The jab is currently approved in the U.S., Europe, Japan and other countries for adults ages 60 and older and expectant mothers who can pass on protection to their fetuses. Nearly 10% of U.S. adults ages 18 to 49 have a chronic condition that puts them at risk of severe RSV disease, according to Pfizer. GSK's RSV vaccine for adults ages 60 and above booked around £1.2 billion ($1.5 billion) in sales last year.

---

Persons: Dr, Iona Munjal, Pfizer's Organizations: Pfizer, CNBC, GlaxoSmithKline Locations: U.S, Europe, Japan