<prompt> Which of the following statements is true about the epidemiological determinants of measles -Measles virus survives outside the human body for 5 daysCarriers are important sources of infectionSecondary attack is less than that of rubellaIncidence of measles is more in males than females  <response>: SAR of some important infectious diseasesMeasles 80 Rubella 90 - 95 Chickenpox 90Pertussis 90Mumps 86 