overwhelm– v. to effect someone very strongly

immune – adj. not capable of being affected by a disease

plasma – n. the watery part of blood

pandemic– n. a worldwide spread of disease

antibody– n. a substance produced in blood to fight disease

germ – n. a small living thing that causes disease

convalescent - adj. the process of becoming well after an illness

symptom– n. a physical feeling or problem that shows that someone has a particular illness