
Older adults may have a second vaccine option for RSV following the U.S. Food and Drug Administration’s approval of a Pfizer vaccine on Wednesday. The other shot for adults 60 and up is made by GSK. It was approved May 3. Both should be available by fall, before the seasonal spread of respiratory syncytial virus (RSV), The New York Times reported. The Pfizer vaccine, known as Abrysvo, has effectiveness of nearly 67% when a patient has two symptoms of RSV, such as a sore throat and cough. It’s 86% effective when three or more symptoms surface. Its GSK competitor — named Arexvy — was about 83% effective against severe RSV, the Times reported. The study on the Pfizer vaccine did include a concern about autoimmune syndromes. One patient among the 34,000 who received the vaccine in the study developed a life-threatening case of Guillain-Barré syndrome a week after receiving the shot. Another developed Miller Fisher syndrome, which is a subtype of that condition. That means the incidence rate for these syndromes is 1 in 9,000, higher than the 1 in 100,000 seen in the general population. FDA advisors voted 7 to 4 in favor of the vaccine’s safety and efficacy. It had voted 10 to 2 for the GSK vaccine, which was linked to similar cases. Advisers for the U.S. Centers for Disease Control and… read on > read on >