1972年初我县沙头公社沙圩大队流行百日咳。该大队系一自然村,人口稠密,于1959年曾发生过百日咳大流行,近三年来未作百日咳预防注射。去年初曾有散发病例发生,未引起注意,至12月底出现首发病例,继而在今年1～3月陆续发病。发病人数共145例,其中男71例,女74例,7岁以下者119例,占该 At the beginning of 1972, our county Sha Tau commune Sha Wei unit prevalence Pertussis. The brigade is a natural village, densely populated, had a pertussis pandemic in 1959, did not make pertussis injections in the past three years. Early last year, cases of sporadic cases occurred, did not pay attention to the first case occurred in late December, followed by 1 to 3 months of this year, one after another disease. A total of 145 cases of patients, including 71 males and 74 females, 119 patients under the age of 7, accounting for the