| A | B |
|---|
| contagious | Spreadable by touch or through the air |
| internal | Inside something rather than outside |
| impact | an effect or result |
| epidemic | the rapid spread of disease among many people |
| resistance | th ability to fight off or overcome something |
| feasible | Possible |
| expose | to leave without protection |
| infect | to give someone a disease |
| estimate | to make a guess |
| courageous | brave |
| vaccine | a substance that protects people against getting a disease |
| laboratory | a place where scientists do research |
| extensive | in-depth, comprehensive |
| allegedly | when something is claimed but not proven |
| contaminate | to infect |
| abandoned | to leave behind |
