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小兒麻痺症 a serious infectious disease that can cause permanent paralysis (= being unable to move the body.
癱瘓 a condition in which you are unable to move all or part of your body because of illness or injury.
注射疫苗 to protect a person or animal against a disease by putting a substance into their body that makes them produce antibodies (= proteins in the blood that fight disease.
防疫注射 the process of protecting a person or animal from an infectious disease by putting a substance in their body that makes them produce antibodies (= proteins in the blood that fight disease.
天花症 an infectious disease that causes a slight fever and red spots on the skin