In a case-control study, among older adults, repeated vaccination for influenza was twice as effective in preventing severe influenza compared to non-severe influenza in patients who were admitted to the hospital.
Results of a recent study indicate a training intervention to aid provider communication about HPV vaccines with teen patients and their parents increased initiation and completion of the vaccine series.
Current estimates suggest that four out of 10 adolescent females and six out of 10 adolescent males are unvaccinated for human papillomavirus (HPV). Approximately 79 million Americans currently are infected with the virus, and about 14 million people become infected each year.
Mumps immunity wanes over time, with a notable increase in risk of infection 13 or more years after completion of the currently recommended series of vaccines. During an outbreak of mumps, receipt of an extra (third, by American schedules) vaccine significantly reduces the risk of becoming sick with mumps.