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作为口服脊髓灰质炎疫苗免疫原性研究的一部分，研究者相继收集了３年来生活在墨西哥恰帕斯州的玛雅族婴儿及其同胞兄姐的粪便标本，研究星状病毒、轮状病毒、腺病毒４０／４１及沙门氏菌、志贺菌、弯曲杆菌的感染状况。方法 研究对象为生活在墨西哥南部恰帕斯州一个有６２９
As part of the study of the immunogenicity of oral polio vaccine, the researchers collected stool specimens of Maya infants and their siblings who lived in Chiapas, Mexico for three years, and studied astrovirus, rotavirus, Virus 40/41 and Salmonella, Shigella, Campylobacter infection status. Methods The study population consisted of 629 living in Chiapas, southern Mexico