Vaccine education groups are asking parents to get their kids vaccinated before school starts.
Veronica McNally is with the Franny Strong Foundation. Her baby girl died at age three months from whooping cough.
She says parents are also protecting babies and immune-compromised people when they vaccinate themselves and their children.
"Whooping cough, for example, would require several doses of dTAP (the pertussis vaccine) before an infant would get vaccine-conferred immunity," says McNally. "So it's important to give that infant the circle of protection -- vaccinating everybody around the infant. And the same is true of influenza."