Warning: Missing argument 3 for write(), called in /www/wwwroot/biwei1.cn/incs/robot.php on line 68 and defined in /www/wwwroot/biwei1.cn/incs/data.php on line 487 美国疾控中心(CDC)最新报告:德尔塔(delta)病毒肆虐期间,人体自然免疫力比疫苗接种强六倍!【文摘】CDC report: Natural immunity was six times stronger during t…