Fears were raised today that a vaccine given to mothers-to-be could raise the risk of babies being born prematurely.Experts have called for tougher scrutiny over the new respiratory syncytial virus () jab, which could be approved in the US and UK later this year.It comes as GlaxoSmithKline halted its own phase three trial of its maternal RSV vaccine in February after discovering an increased risk in premature births in vaccinated mothers.
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