Y'know, I wouldn't be surprised if there were something to the supposition that folks had COVID19 last year before it came to popular attention. I was damn sick for most of December and it took a solid 2 weeks to get over. I'll never know what it was, so whatever.
照美国抗疫这个德行，如果2019年12月甚至10月或者8月已经登录本土，现在美国已经是尸横遍野一片焦土了哦。