驻西藏高原部队,自1959年以来,时有原因不明的发热与淋巴结肿痛病人发生,其情况如下。一、流行特征散在发生或呈局部流行。(1)1959年在甲市附近执行任务的分队,于10月中旬4天内先后发生5名病人;(2)1961年5月7日,乙市某厂司务长,因不明发热伴右腋下淋巴结肿大而就诊;(3)1962年6月8日,乙市某陆 Troops in the Tibetan Plateau have been suffering from unexplained fever and lymph node swelling since 1959, as follows. First, the prevalence of scattered features or was a local epidemic. (1) In 1959, a detachment carrying out the task near the city of A has 5 patients in succession within 4 days in mid-October; (2) On May 7, 1961, the chief clerk of a plant in City B, due to unknown fever with right axillary lymph node Swollen and treated; (3) June 8, 1962, B ​​some land