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Marion Carter1, Kathleen Desilets2, Lorrie Gavin3, Sue Moskosky2, Jill Clark4 (Author affiliations at end of text).

Flu Vaccine Effectiveness - CDC

Guidance for the Prevention and Control of Influenza in the Peri- and Postpartum Settings - CDC

Information about flu for specific groups including parents, schools and childcare providers, businesses and employers, high risk persons with chronic illnesses, and pregnant women - CDC

This is a time of many physical, mental, emotional, and social changes. Hormones change as puberty begins. Most boys grow facial and pubic hair and their voices deepen.

While it is unusual for people to get influenza infections directly from animals, sporadic human infections and outbreaks caused by certain avian influenza A viruses have been reported - CDC

Study Finds Flu Vaccine Reduces Risk of Flu Illness in Pregnant Women by Half - CDC

Information for Health Care Professionals and Public Health related to Avian Influenza A H5N1 and H7N9 - CDC

Please note: An erratum has been published for this article. To view the erratum, please click here.

This is another in a series of occasional MMWR reports titled CDC Grand Rounds. These reports are based on grand rounds presentations at CDC on high-profile issues in public health science, practice, and policy. Information about CDC Grand Rounds is available at http://www.