| A | B |
| Plague | A disease that kills a large number of people. |
| Infected | Having germs that cause a disease |
| Microbes | Tiny organisms or germs too small to be seen without a microscope |
| Antibodies | A special substance produced by the body to destroy or weaken germs |
| Bacteria | Germs |
| Vaccine | A special substance used to protect a person or animal from a disease |
| Epidemic | The rapid spreading of a disease so that many people have it at the same time |
| Sterilize | To make free from living germs |
| Hippocrates | Father of medicine |
| Immune | To be protected from getting a disease; not able to catch a disease |
| Flask | A bottle shaped container used in laboratories for heating liquid |
| Contaminated | To make impure, dirty or polluted |
| Rontegen | Discovered X-Rays |
| Jonas Salk | Vaccination for Polio |
| Contaminated | To make impure, dirty or polluted |
| Wound | Injury |
| Circulate | To move in or flow through the body in a circle |
| Anton van Leeuwenhoek | Invented the microscope |
| Benjamin Franklin | Invented bifocal glasses |
| Dispel | Prove wrong |
| Louis Pasteur | Created pasteurization, a form of sterilization |