The numbers were small, on the order of two cases per 100,000 vaccinated people or fewer, and much more data is needed to pin down the risk, the officials said.
Ongoing surveillance will be better able to determine if an increased risk for G.B.S. after R.S.V. vaccination is present, and if so the magnitude of the risk, he said.
[
add
]
[
|
|
...
]