But now, given their action, the finding of virus DNA in Rotateq and the inevitable hysteria of the vaccine activists, some parents will be confused enough to delay vaccinating their children.
The first study - involving more than 68, 000 infants aged six to 12 weeks - found a vaccine called Rotateq being developed by the pharmaceutical company Merck could safely prevent 98% of severe cases of viral diarrhoea and vomiting.