Epidemiology exam 2

a variable is vaild measure of a property if it is relevant and appropriate as a representation of that property

health is the state of complete physical, mental, social and spiritual well being and not merely the absence of disease or infirmity

inductive period

incubation period

• induction time--person time is irrelevant
• relevant person time--time when person know and feels sick--early stage doctor will not find anything
• biological onset--toixins being attacking cells--if go to doctors disease will be detected
• latent period--person time is irrelevant--person has disease already

disease free time