对的,上半年上海的数据当时就已经有了研究结论,Preplanned Studies: Dynamic Disease Manifestations Among Non-Severe COVID-19 Patients Without Unstable Medical Conditions: A Follow-Up Study — Shanghai Municipality, China, March 22–May 03, 2022,76-78%最终被诊断为无症状,19%有咳嗽,5%有疲劳,4%有发热,虽然目前omicon流行有其他毒株,但毒性不可能有大幅变化,只能解释是有大量无症状者存在而不自知