Which of the following statements is true about the epidemological determinants of measles ?
Measles virus survives outside the human body for 5 days
Carriers are impoant sources of infection
Secondary attack is less than that of rubella
Incidence of measles is more in males than females
Ans. is 'c' i.e., Secondary attack rate is less than that of rubella SAR of some impoant infectious diseases o Measles 80% o Rubella 90 - 95% o Chicken pox - 90% o Peussis - 90% o Mumps - 86% About other options o The measles virus cannot survive outside the human body for any length of time. But it retains infectivity when stored at sub - zero temprature. The only source of infection is a case of measles, carriers are not known to occur. Incidence of measles is same in males and females.