07:43 AM EDT, 06/27/2024 (MT Newswires) -- The US Centers for Disease Control said Wednesday it updated its recommendation for the use of respiratory syncytial virus, or RSV, vaccines among elderly people, prioritizing those who are at least 75 years old and those who are at risk of contracting severe RSV.

"The CDC has updated its RSV vaccination recommendation for older adults to prioritize those at highest risk for serious illness from RSV," CDC Director Mandy Cohen said in a statement.

The CDC is now recommending people aged 75 and older, as well as people aged 60 to 74 years who are at increased risk of severe RSV or those that have certain chronic medical conditions, to receive the RSV vaccine.

Last year, the CDC recommended the use of the RSV vaccine for people aged 60 years and above.

Meanwhile, eligible adults may still get the RSV vaccine any time but the CDC recommends the best time to be vaccinated is during the late summer and early fall.

Moderna ( MRNA ) shares were down 0.8% and GSK (GSK) fell 1.3% in recent Thursday premarket activity, as the guidance could reduce the market for the vaccine. Shares of Pfizer ( PFE ) rose 0.2% pre-bell.

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