Pfizer 's vaccine against respiratory syncytial virus maintained protection for older adults across two full seasons of the disease in an ongoing late-stage clinical trial, the company announced Thursday.
The shot's efficacy declined slightly compared with the levels of protection after one RSV season, but the new data suggests that the jab generally offers durable protection for adults ages 60 and above, who are more vulnerable to severe illness from RSV.
The jab showed 66.7% efficacy against that condition after one RSV season.
Pfizer noted that the vaccine showed consistent efficacy against RSV A and RSV B, which are the two major subtypes of the virus, after the second RSV season.
Analysts don't expect the committee to make a final recommendation until June – a decision that may have huge implications for Moderna , which is hoping to launch its own RSV jab this year.
Persons:
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Organizations:
Pfizer, GlaxoSmithKline, Centers for Disease Control, Moderna
Locations:
Northern, Southern