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本文对299例波状热病人(分为三组)随访观察了六年。第一组176例:血清标准凝集试验效价20倍或更高。如果凝集试验低于20倍者,则反
299 cases of patients with corrugated fever (divided into three groups) were followed up for six years. The first group of 176 patients: serum standard agglutination test titer 20 times or more. If the agglutination test less than 20 times, then anti