LONDON, Oct 13 (Reuters) - Data unveiled on Thursday showed GSK's (GSK.L) respiratory syncytial virus (RSV) vaccine was 82.6% effective in a keenly watched late-stage study involving older adults.
The company is a key player in the race to develop a safe and effective RSV vaccine, which, if approved, is expected to generate billions in sales for its maker.
If approved, Jefferies analysts have forecast $2.5 billion in global RSV vaccine peak sales in older adults for GSK.
U.S. drugmaker Pfizer (PFE.N) in August disclosed positive Phase III data on its rival RSV vaccine in older adults.
In trial participants with pre-existing conditions, the GSK vaccine was shown to be 94.6% effective, while in adults aged 70 to 79 it was 93.8% effective, the company said.