In China, did you find cases of young patients (under 55 years old) with rapid clinical evolution? Patients who start with symptoms and worsen abruptly, intensive care and death. / 在中国您们遇到过55岁以下的年轻病人病情恶化很快的情况么:他们出现症状以后病情急剧恶化 ，需要重症监护最后还是无法救治而死亡