Killing power of a disease is best expressed by:
a.Attack Rate.
b.Secondary Attack rate.
c.Case fatality rate.
d.Survival index.
e.Proportionate mortality rate.
Key: c
Difference in incidence rate of disease between exposed group and non exposed group is:
a.Attributable fraction
b.Relative risk
c.Attributable risk
d.Prevalence rate
e.Odds ratio
Key: c
Koplik’s spots are the diagnostic sign of one of the following diseases:
a.Rubella
b.Whooping cough
c.Measles
d.Meningitis
e.Mumps
Key: c