- capillary: (n) Any of the tiny blood vessels that connect the smallest arteries to the smallest veins. (adj) Small and slender, with a very small internal diameter.
- convalescence: (n) Gradual return to health and strength after an illness or other problem.
- enervate: (v) To weaken; to destroy strength.
- epidemiology: (n) The branch of medicine that deals with the causes, spread, and control of disease in populations.
- epidermis: (n) The protective outer skin of vertebrates.
- infirmity: (n) A physical disability or weakness.
- malady: (n) A disease, ailment or disorder.
- pallor: (n) Extreme or unnatural paleness.
- susceptible: (adj) Likely to be infected or made ill. Easily influenced or affected; sensitive.
- virulent: (adj) Capable of causing infection; very harmful or poisonous. Strongly and bitterly hateful.
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