Case fatality rate is -
Ans. is 'b' i.e., Killing power of disease * CFR represents the killing power (severity) of a disease.CFR=Total no. of deaths due to a disease--------------------------------Total no. of cases of the same diseasex 100* CFR is typically used in acute infectious disease e.g.food poisoning, cholera, measles. Its usefulness in chronic disease is limited, because the period from onset to death is long and variable.* CFR is closely related to virulence of agent.* Limitation of CFR is that time period is not specified.* The case fatality rate for the same disease may vary in different epidemics because of changes in host, agent and environment factors.
Communicability of disease
Killing power of disease
Burden of a disease
All of the above
Epidemiology