
Pfizer's child-sized vaccine fails to produce expected immunity in younger kids; company adds third dose to trials
CNN
Vaccine maker Pfizer said Friday that trials of its vaccine in children ages 2 to 5 show it did not provide the expected immunity in kids this age and it is adding a third dose to the regimen.
The company decided to add the third dose for all children and babies ages 6 months to 5 years after its independent outside advisers took a look at the data so far.
It showed that two child-sized doses of the Pfizer/BioNtech vaccine was not producing the expected immunity in the 2- to 5-year-olds, although it was doing so for the babies up to age 2.
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