This is the first report of the presence of FMDV in bull semen due to natural infection in China. 这也是我国首次证实自然感染牛的精液被口蹄疫病毒污染。
Because natural rotavirus infection was not associated with intussusception, they reasoned their vaccine would similarly not increase the risk of this complication. 由于自然感染轮状病毒并不会造成肠套叠，因此他们认为新疫苗也不会增加这种并发症的风险。
