VOA慢速英语:专家们好奇为什么印度的新冠病例数会减少

mask – n. a covering used to hide or disguise your face

flare-up – n. a situation in which something – such as violence, pain or anger suddenly starts or gets much worse

ventilator – n. a machine that helps a person breathe

vulnerable – adj. easily hurt or harmed physically, mentally, or emotionally

expose – v. to put (someone or something) at risk from a harmful action or condition

immunity – n. to be protected against catching a disease

innate – adj. inborn or natural