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Publication of CDC Surveillance Summaries

Since 1983, CDC has published the CDC Surveillance Summaries under separate cover as part of the MMWR series. Each report published in the CDC Surveillance Summaries focuses on public health surveillance; surveillance findings are reported for a broad range of risk factors and health conditions.

Summaries for each of the reports published in the most recent (September 4, 1992) issue of the CDC Surveillance Summaries (1) are provided below. All subscribers to MMWR receive the CDC Surveillance Summaries, as well as the MMWR Recommendations and Reports, as part of their subscriptions. ABORTION SURVEILLANCE -- UNITED STATES, 1989

Since 1980, the number of legal induced abortions reported to CDC has remained stable, varying each year by less than 5%. In 1989, 1,396,658 abortions were reported -- a 1.9% increase from 1988. The abortion ratio for 1989 was 346 legal induced abortions/1000 live births, and the abortion rate was 24/1000 women ages 15-44 years. The abortion ratio was highest for black women and women of other minority racial groups and for women less than 15 years of age. Women undergoing abortions tended to be young, white, and unmarried; to have had no previous live births; and to be having the procedure for the first time. Approximately half of all abortions were performed before the 8th week of gestation, and 87% were before the 13th week of gestation. Younger women tended to obtain abortions later in pregnancy than older women.

This report also includes newly reported abortion-related deaths for 1986 and 1987, as well as an update on abortion-related deaths for the period 1978-1985. Ten deaths in 1986 and six deaths in 1987 were associated with legal induced abortion. The case-fatality rate in 1986 was 0.8 abortion-related deaths/100,000 legal induced abortions and 0.4/100,000 in 1987. Authors: Lisa M. Koonin, MN, MPH, Jack C. Smith, MS, Merrell Ramick, Herschel Lawson, MD, Division of Reproductive Health, National Center for Chronic Disease Prevention and Health Promotion, CDC. INFLUENZA SURVEILLANCE -- UNITED STATES, 1991-92

During the 1991-92 influenza season, substantial levels of influenza activity began to be reported in the United States in early November 1991, 5-10 weeks earlier than in any of the previous nine influenza seasons. Influenza activity peaked from mid-December 1991 to mid-January 1992. By early March 1992, influenza activity as measured by all four surveillance systems had returned to baseline levels, 5-8 weeks earlier than average for the previous nine influenza seasons. The pneumonia and influenza deaths from the 121 cities participating in surveillance exceeded the epidemic threshold for 7 consecutive weeks during the season, demonstrating excess mortality due to influenza during this season.

Nationally, greater than 99% of isolates were influenza A. Of these, 81% were influenza A(H3N2) and 19% were influenza A(H1N1). The majority of isolates characterized were antigenically similar to components in the 1991-92 influenza vaccine. However, an influenza A(H1N1) strain that had undergone antigenic drift was detected in many regions of the country, and this strain will be included in the 1992-93 influenza vaccine. Authors: Joseph H. Kent, MD, Louisa E. Chapman, MD, MSPH, Leone M. Schmeltz, Lawrence B. Schonberger, MD, MPH, Epidemiology Activity, Office of the Director; Helen L. Regnery, PhD, Nancy J. Cox, PhD, The WHO Collaborating Center for Surveillance, Epidemiology, and Control of Influenza, Influenza Branch, Division of Viral and Rickettsial Diseases, National Center for Infectious Diseases, CDC.

Reference

  1. CDC. CDC surveillance summaries (September 5). MMWR 1992;41(no. SS-5).



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