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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.

Israel T. Agaku, DMD1,2, Brian A. King, PhD2, Shanta R.

On January 17, 2014, 50 years after the first Surgeon General's report on smoking and health, the Surgeon General will release The Health Consequences of Smoking—50 Years of Progress (1). The report will be released at a White House press conference at 9:30 a.m.

Persons using assistive technology might not be able to fully access information in this file. For assistance, please send e-mail to: mmwrq@cdc.gov.

Persons using assistive technology might not be able to fully access information in this file. For assistance, please send e-mail to: mmwrq@cdc.gov.