Simplify the following text for a Grade 10 native English-speaking person.
Original: In response , concern has been raised that spreading unfounded information about the medical risks of vaccines increases rates of life-threatening infections , not only in the children whose parents refused vaccinations , but also in other children , perhaps too young for vaccines , who could contract infections from unvaccinated carriers ( see herd immunity ) .
Simplified: In response , concern has been raised about the medical risks of vaccines , increased rates of life-threatening infections .