- 人类 人類 nounhumanityhumanity; humankind; the human race
- 免疫 adjectivenounimmunityBiological resistance to a specific disease, pathogen, or toxin; to be immune
- 缺乏 verbto lackto be short of; to be deficient in something that is desired or required
- 病毒 nounvirusa type of tiny microorganism that causes infection and can only reproduce inside the living cells of a host