exercise 1.10
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endemic disease
about 60 cases of gonorrhea are usually reported in this region per week, slightly less than the national average
sporadic disease
single case of histoplasmosis was diagnosed in a community
epidemic disease
22 cases of legionellosis occurred within 3 weeks among residents of a particular neighborhood (usually 0 or 1 per year)
hyperendemic disease
average annual incidence was 364 cases of pulmonary tuberculosis per 100,000 population in one area, compared with the national average of 134 cases per 100,000 population
pandemic disease
over 20 million people worldwide died from influenza in 1918-1919