Across
- 3. a substance, especially in the form of a liquid or a pill, that is a treatment for illness or injury.
- 4. a microorganism, especially one that causes ilnesses.
- 5. a substance used to stimulate the production of antibodies and provide immunity against one or several diseases.
Down
- 1. the systematic investigation into and study of materials and sources in order to establish facts and reach new conclusions.
- 2. a disorder of structure or function in a human, animal, or plant, especially one that produces specific signs or symptoms or that affects a specific location and is not simply a direct result of physical injury.