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Early Release

Current Weekly

  • HIV Testing Experience Before HIV Diagnosis Among Men Who Have Sex with Men — 21 Jurisdictions, United States, 2007–2013

    	The figure above is a photograph of two men having a conversation.September 23, 2016
    CDC analyzed data for 2007–2013 from jurisdictions conducting HIV incidence surveillance as part of CDC’s National HIV Surveillance System. Findings from this analysis suggest that increasing percentages of men who have sex with men have had a negative HIV test during the 12 months before diagnosis (48% in 2007, 56% in 2013, among those with a known date of previous negative HIV test), indicating a trend toward increased HIV testing and earlier HIV diagnosis among persons most at risk for HIV.

  • Update: Influenza Activity — United States and Worldwide, May 22–September 10, 2016

    	The figure above is an infographic in support of CDC Flu’s “Fight Flu” campaign. September 23, 2016
    During May 22–September 10, 2016, the United States experienced typical low levels of seasonal influenza activity overall. However, clinical laboratories reported a slight increase in influenza positive test results since late August, and CDC has received reports of a small number of localized influenza outbreaks caused by influenza A (H3N2) viruses.


Surveillance Summaries

  • National Estimates of Marijuana Use and Related Indicators — National Survey on Drug Use and Health, United States, 2002–2014

    September 2, 2016
    Marijuana is the most commonly used illicit drug in the United States. In 2013, 7.5% (19.8 million) of the U.S. population aged ≥12 years reported using marijuana during the preceding month. Because of certain state-level policies that have legalized marijuana for medical or recreational use, population-based data on marijuana use and other related indicators are needed to help monitor behavioral health changes. This report describes national trends for prevalence of marijuana use; initiation; perception of harm risk, approval, and attitudes; perception of availability and mode of acquisition; dependence and abuse; and perception of legal penalty for marijuana possession.

Recommendations and Reports

  • Prevention and Control of Seasonal Influenza with Vaccines: Recommendations of the Advisory Committee on Immunization Practices — United States, 2016–17 Influenza Season

    August 26, 2016
    This report updates the 2015–16 recommendations of the Advisory Committee on Immunization Practices (ACIP) regarding the use of seasonal influenza. Routine annual influenza vaccination is recommended for all persons aged ≥6 months. For the 2016–17 influenza season, inactivated influenza vaccines (IIVs) will be available in both trivalent (IIV3) and quadrivalent (IIV4) formulations. Recombinant influenza vaccine (RIV) will be available in a trivalent formulation (RIV3). In light of concerns regarding poor effectiveness against influenza A(H1N1)pdm09 in the United States during the 2013–14 and 2015–16 seasons, for the 2016–17 season, ACIP makes the interim recommendation that live attenuated influenza vaccine (LAIV4) should not be used. Vaccine virus strains included in the 2016–17 U.S. trivalent influenza vaccines will be an A/California/7/2009 (H1N1)–like virus, an A/Hong Kong/4801/2014 (H3N2)–like virus, and a B/Brisbane/60/2008–like virus (Victoria lineage). Quadrivalent vaccines will include an additional influenza B virus strain, a B/Phuket/3073/2013–like virus (Yamagata lineage). These recommendations apply to all licensed influenza vaccines used within Food and Drug Administration–licensed indications, including those licensed after the publication date of this report. Updates and other information are available at CDC’s influenza website ( Vaccination and health care providers should check CDC’s influenza website periodically for additional information.


Notifiable Diseases