Morbidity and mortality weekly report, Vol. 21, no. 16, For week ending April 22, 1972

Table 1. Cases of specified notifiable diseases: United States -- Table 2. Notifiable diseases of low frequency -- Table 3. Cases of specified notifiable diseases: United States for weeks ended April 22,1972 and April 24, 1971 (16th week) -- Table 4. Deaths in 122 United States cities for week ended April 22, 1972Epidemiologic notes and reports: Follow-up on human rabies - TexasCurrent trends: The public health implications of the presence of hepatitis B antigen in human serum -- Recommended treatment schedules for gonorrhea - March 1972 - Addendum, Vol, 21, No. 10International notes: Poliomyelitis - Nicaragua, 1971 -- Follow-up on smallpox - Yugoslavia -- Smallpox surveillance - Worldwide -- Quarantine measuresTable 1. Age distribution of reported cases of poliomyelitis, Nicaragua - January 1, 1971 - January 31, 1972 -- Table 2. Cases of smallpox, by week of onset, Yugoslavia - February - April 1972 -- Table 3. Distribution of smallpox cases by age, sex, and vaccination status - Ethiopia, 1971 -- Table 4. Susceptibility to smallpox among residents of 9,819 affected households, Ethiopia - 1971Figure 1. Poliomyelitis cases, by date of report, Nicaragua, January 1, 1971 - January 31, 1972 -- Figure 2. Smallpox cases and cases per 100,000 population, Ethiopia - 1971 -- Figure 3. Smallpox cases, by 4-week period - Ethiopia, 197