Published: Aug 19, 2010 8:06 PM EDT
Updated: Aug 19, 2010 5:06 PM EDT

DOVER, Del. (AP) - A former Delaware doctor charged with sexually assaulting more than 100 of his patients also may have given diluted or expired vaccines to children.

State health officials this week have been sending warning letters to parents of children treated by former Lewes pediatrician Earl Bradley.

They said they can't confirm the accuracy of allegations that Bradley administered faulty vaccines, but that children may need to be revaccinated if they received vaccines from him.

Officials said receiving diluted or expired vaccine would not likely cause harm, but that children may not be adequately immunized against infection. Parents are being urged to consult with their doctors about additional vaccinations.