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Coxsackievirus A21 and enterovirus 68 are significant causes of enterovirus-associated adult acute respiratory tract infections in Beijing.
During August 2006-April 2010, in Beijing, China, 2 rare human enterovirus serotypes, coxsackievirus A21 and enterovirus 68, were detected most frequently in human enterovirus-positive adults with acute respiratory tract infections. Thus, during some years, these 2 viruses cause a substantial proportion of enterovirus-associated adult acute respiratory tract infections.
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Xiang et al. (2012) studied this question.
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