這是另一個拿昧心錢的騙子。科學院的院士基本上都是御用宣傳人士。外國人接近免疫,而不是你說的群體免疫。resistance to the spread of an infectious disease within a population that is based on pre-existing immunity of a high proportion of individuals as a result of previous infection or vaccination.
"the level of vaccination needed to achieve herd immunity varies by disease but ranges from 83 to 94 percent"你們牆國是自然感染,而不是疫苗接種。你媽的!只有小學博士才只用自然感染。牆國面臨一波又一波的感染,因為沒有疫苗。老人會從一個健康人直至變成病人和弱者。是個靠混蛋專家。