The Morbidity and Mortality Weekly Report (MMWR) Series is prepared by the Centers for Disease Control and Prevention (CDC). [It] is the agency's primary vehicle for scientific publication of timely, reliable, authoritative, accurate, objective, and useful public health information and recommendations. This issue of MMWR contains the following: "Sexual Intercourse Among High School Students -- 29 States and United States Overall, 200-2015"; "Health Care Provider Counseling for Physical Activity or Exercise Among Adults with Arthritis -- United States, 2002 and 2014"; "Prevalence and Trends in Prepregnancy Normal Weight -- United States, 2011-2015"; "Notes from the Field: Lead Contamination of Opium -- Iran, 2016"; "Notes from the Field: Investigation of Carbapenemase-Producing Carbapenem-Resistant Enterobacteriaceae Among Patients at a Community Hospital -- Kentucky, 2016"; "Announcement: Birth Defects Month and Folic Acid Week"; "QuickStats: Percentage of Adults Aged ≥18 Years Who Currently Use E-Cigarettes, by Sex and Age Group -- National Health Interview Survey, 2016"; "Notifiable Diseases and Mortality Tables (51st Week)"; and "Notifiable Diseases and Mortality Tables (52nd Week)."
Morbidity and Mortality Weekly Report: http://www.cdc.gov/mmwr/index.html/
MMWR: Morbidity and Mortality Weekly Report (January 5, 2018), v.66 no.51 & 52