Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
pandemic – n. a situation in which a disease spreads very quickly and affects a large number of people over a wide area
according – adv. as stated by or in
detectable – adj. capable of being discovered or noticed
transmit – v. to cause (a virus or disease) to be given to others
medication – n. a substance used in treating disease or easing pain
prescription – n. written directions for use of a medicine
trajectory – n. the curved path along which something (such as a rocket) moves through the air or through space -- often used figuratively to describe a process of change or development that leads toward a particular result
needle – n. a very thin, pointed steel 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
condom – n. a thin rubber covering that a man wears during sex to prevent a woman from becoming pregnant or to prevent the spread of diseases
