An impoant measure of the communicability of a disease is -
.secondary attack rate is defined as the number of exposed persons developing the disease within the range of the incubation period following exposure to a primary case.its application is limited only to infectious diseases,in which the primary case is infective,.duration of exposure is also an impoant factor in determining the extent of spread. ref:park&;s textbook,22nd edition,pg no 96
Case fatality rate
Disease specific moality rate
Infection rate
Secondary attack rate
Epidemiology