MEASLES (Rubeola) - Counties reporting cases, United States, 1984 Fourteen states reported no cases of measles in 1984, and 22 states and the District of Columbia reported no indigenous cases. Seven states accounted for 2,108 (81.5%) of the 2,587 cases: Texas (642 cases), Michigan (464), California (326), Illinois (186), Washington (178), New York (170), and Hawaii (142). Of the nation's 3,139 counties, only 210 (6.7%) reported any measles cases. In contrast, measles was reported from 988 counties in 1978, when the Measles Elimination Program began. These data indicate that measles had been eliminated from most of the United States by the end of 1984. MEASLES (Rubeola) - Rates, by age group, United States, 1982-1984 *Rates were calculated by multiplying the percentage of cases with known age group by total reported cases and dividing by the population in that age group. Age data were available for 2,583 (99.8%) cases. The increase in reported measles activity between 1983 and 1984 was seen among all age groups. The greatest increase occurred among persons 10-14 years old, who also had the highest incidence of the disease. MEASLES (Rubeola) - Age distribution of cases, United States, 1984 0-15 Mo 16 Mo- 5-9 Yr 10-14 Yr 15-19 Yr 20-24 Yr 25-29 Yr >30 Yr AGE GROUP Information was provided to the Division of Immunization on importation and preventability for 2,543 cases. A total of 2,340 (92.0%) were acquired within the United States and were not associated with an international importation, and 203 (8.0%) were importation-associated (109 international importations and 94 cases spread within two generations of the imported case). A total of 874 cases (34.4%) were classified as preventable. The highest proportion of preventable cases occurred among those 16 months-4 years of age (73.4% of age group) and 20-29 years of age (71.4% of age group). However, more than half of all preventable cases occurred among school-age persons (5-19 years old). A case is considered preventable if measles occurs in a U.S. citizen who is 1) at least 16 months of age; 2) born after 1956; 3) lacking adequate evidence of immunity to measles (documented receipt of live measles vaccine on or after the first birthday, physician-diagnosed measles, or laboratory evidence of immunity); 4) without a medical contraindication to receiving vaccine; and 5) with no religious or philosophic exemption under state law. MEASLES (Rubeola) - Distribution and mean annual incidence of reported cases by age group, four reporting areas,* 1960-1964, 1976-1980, 1981-1984 *Yearly average for each interval. *New York City, District of Columbia, Illinois, and Massachusetts. §These selected data accurately reflect incidence rates using total U.S. data. The age distribution of total U.S. cases differed in that 31.7% of patients were < 5 years old and 20.8% of patients were 10-14 years old. 1980 population data were used. MENINGOCOCCAL INFECTIONS — Rates, by year, United States, 1930-1984 In 1984, 2,746 cases of meningoccal infection were reported in the United States. The case rate of 1.2 cases/100,000 population was identical to the rate for 1983. Age-specific attack rates peaked at 17.1 cases/100,000 among infants under 1 year of age and declined to 5.2 cases/100,000 among children 1-4 years of age. Approximately 50% of reported cases affected children under 5 years of age. The peak of reported cases occurred in late winter and early spring. Only six cases were reported among members of the military service. |