ch14 pt3

microbiology; disease occurrence

incidence

number of people who get a disease during a particular time period

prevalence

number of people who have a disease at a specific time; takes into account both old and new cases (in a month, year, week, etc.)

sporadic disease

occurs only occasionally

endemic disease

constantly present in a population

epidemic disease

acquired by many people in a given area in a short time

pandemic

worldwide epidemic

sporadic

if the average annual incidence of giardiasis is 2 cases, we’d classify it as a ________ disease in that region

herd immunity

prevents epidemics and pandemics, 60-95% of population needs to be vaccinated, important for those that can’t be immunized