Which of the following statements is true about the epidemiological determinants of measles -
Measles virus survives outside the human body for 5 days
Carriers are important sources of infection
Secondary attack is less than that of rubella
Incidence of measles is more in males than females
SAR of some important infectious diseases

Measles → 80% 
Rubella → 90 - 95% 
Chickenpox → 90%
Pertussis → 90%
Mumps → 86%