The Food and Drug Administration on Friday expanded the approval of GSK's respiratory syncytial virus vaccine to adults ages 50 to 59 who are at increased risk of getting severely sick from the potentially lethal virus. The shot, called Arexvy, is the first vaccine cleared by the FDA to protect that population from RSV. The agency first approved GSK's jab in May 2023 for patients 60 and above, who are more vulnerable to severe cases of the virus. RSV causes thousands of hospitalizations and deaths among sen ...