Herd immunity occurs when enough people in a group are immune to a specific infection that it cannot spread easily from person to person. Vaccination programs have been successful in creating herd ...

A vaccine administered to adolescent girls and boys has been so successful that herd immunity against a virus that causes cervical cancer is within reach, at least in the United States. However, ...

School-based immunisation against human papillomavirus (HPV) could also offer protection against the development of pre-cancerous cells in unvaccinated women through herd immunity, according to a ...