VOA慢速英语:卫生官员关注新冠疫苗的副作用

allergic –adj., allergy –n. related to a medical condition that causes someone to become sick after coming in contact with a substance that is harmless to most people

ingredient –n. one of the substances that make up a mixture

puffy –adj. larger than normal, swollen

scratchy –adj. painful, larger, or rougher than normal

monitor –v. to watch, observe listen or check for a special purpose, such as health, over time

discomfort –n. an uncomfortable or painful feeling in the body

symptom –n. a sign that a disease or problem is present

benefit -–n. good, helpful or healthful results