Health

2. The invasion and multiplication of microorganisms such as bacteria, viruses, and parasites that are not normally present within the body.
3. A physical or mental feature that indicates a condition or disease.
4. A doctor who specializes in the treatment of cancer.
6. A damaging immune response by the body to a substance, especially pollen, fur, a particular food, or dust, to which it has become hypersensitive.
7. A doctor who specializes in diagnosing and treating heart diseases.
11. Maintaining adequate fluid balance in the body.
12. A doctor who specializes in treating skin disorders.
14. The identification of the nature of an illness or other problem by examination of the symptoms.
15. The science dealing with X-rays and other high-energy radiation, especially for the diagnosis and treatment of disease.
17. A doctor's written order for the administration of a drug or device.
18. A patient who receives medical treatment without being admitted to a hospital.

1. The administration of a vaccine to help the immune system develop protection from a disease.
3. The treatment of injuries or disorders of the body by incision or manipulation, especially with instruments.
5. Medical care given to a patient for an illness or injury.
8. A condition with a rapid onset and a short, severe course.
9. Persisting for a long time or constantly recurring, especially of a disease.
10. A localized physical condition in which part of the body becomes reddened, swollen, hot, and often painful, especially as a reaction to injury or infection.
11. Conditions or practices conducive to maintaining health and preventing disease, especially through cleanliness.
13. The action of stopping something from happening or arising.
16. A thorough examination, especially a medical or dental one, to detect any problems.
19. Treatment intended to relieve or heal a disorder.