U.S. sales of RSV vaccines from GSK and Pfizer are down significantly after regulators narrowed the targeted age group and said it was a once-in-a-lifetime shot for now, excluding millions of people who got one last year.

The UK High Court has ruled that two GSK respiratory syncytial virus (RSV) vaccine patents are invalid in an action involving Pfizer, as both companies battle to become the first to launch an RSV vaccine on the UK market.

RSV vaccine sales by GSK and Pfizer have dropped in the U.S. after regulators limited the eligible age group, affecting millions. Demand has decreased significantly during the autumn vaccination season,

Pfizer on Monday won a bid in a London court to invalidate two of GSK's patents relating to a respiratory syncytial virus (RSV) vaccine. The two pharmaceutical giants are among a number of companies in competition for a vaccine for RSV,

Pfizer Inc. (NYSE:PFE) stock is trading higher with a session volume of 31.16 million as per data from Benzinga Pro. Activist investor Starboard Value has invested approximately $1 billion in Pfizer as the pharmaceutical giant grapples with a downturn in demand for COVID-19 vaccines and treatments.

This is the first RSV vaccine approved in Singapore for use in older adults and pregnant individuals, providing critical protection to infants and seniors

Pfizer and its German partner BioNTech on Tuesday won their attempt to invalidate two of rival CureVac's patents at London's High Court.

Pfizer (NYSE:PFE) has reportedly succeeded in getting a U.K. court to invalidate two of GSK’s (NYSE:GSK) patents for its RSV vaccine. The ruling is part of ongoing litigation between the two drugmakers over their respective RSV vaccines.