MMWR. Morbidity and mortality weekly report, Vol. 39, no. 50, December 21, 1990

Update: Salmonella enteritidis infections and shell eggs--United States, 1990. -- Influenza surveillance--Wales, 1988-89. -- Human T-lymphotropic virus type I screening in volunteer blood donors--United States, 1989. -- Decline in Haemophilus influenzae type b meningitis--Seattle-King County, Washington, 1984-1989. -- Food and Drug Administration approval of use of a Haemophilus b Conjugate Vaccine for infants. -- Extension of filing deadline for National Vaccine Injury Compensation Program. -- Combined issues of MMWR. -- Figure I. Notifiable disease reports, comparison of 4-week totals ending December 15, 1990, with historical data--United States. -- Table I. Summary--cases of specified notifiable diseases, United States, cumulative, week ending December 15, 1990 (50th week). -- Table II. Cases of specified notifiable diseases, United States, weeks ending December 15, 1990, and December 16, 1989 (50th week). -- Table III. Deaths in 121 U.S. cities, week ending December 15, 1990 (50th week).1990626