美专家：加州人或已在去年秋天就遇到新冠病毒
（原标题：【加州感染人数为何“远低于预期”？美专家表示新冠病毒可能去年秋天在加州出现）https://v.163.com/swf/video/NetEaseFlvPlayerV3.swf美专家表示新冠病毒可能去年秋天在加州出现
【加州感染人数为何“远低于预期”?美专家表示新冠病毒可能去年秋天在加州出现】#加州人或已在流感季早期就遇到新冠#，为验证是否有部分“群体免疫”，研究人员已展开抗体测试。When asked about why COVID-19 cases in California state is lower than expected, Hoover Institute's Victor Davis Hanson told ABC News that people in California may have been exposed to COVID-19 last fall, helping the state develop an early herd immunity. The state recorded an early flu season in 2019. Stanford researchers are testing people for COVID-19 antibodies to verify the theory.
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