Biology
Define:
(a) Infection
(b) Pathogen
(c) Incubation
(d) Disease
(e) Vaccine
Diseases
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Answer
(a) Infection — The transmission of diseases from one person to another is called infection.
(b) Pathogen — A pathogen is a disease-causing micro-organism.
(c) Incubation — Incubation period is the period between the entry of germs and appearance of the first symptoms of the disease. All infectious diseases have a certain incubation period.
(d) Disease — Disease is a departure from normal health through structural or functional disorder of the body.
(e) Vaccine — Vaccine is a biological formulation that consist of dead or weakened disease causing organism that provides active acquired immunity to a particular infectious disease.
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