VOA慢速英语:New Vaccination Method Protects Against Influenza

clinical – adj. of or relating to a medical treatment

patch - n. a piece of material that is worn for medical reasons

needle – n. a very thin, pointed tube that is pushed through the skin so that something, such as a drug, can be put into your body or so that blood or other fluids can be taken from it

prone – adj. likely to do, have, or suffer from something