True about Pertussis is/are -a) Incubation period is 7-14 daysb) Main source of infection is chronic carriersc) Can affect any aged) Secondary attack rate in unimmunised persons is 90%e) More common in summers

Social & Preventive Medicine

True about Pertussis is/are -a) Incubation period is 7-14 daysb) Main source of infection is chronic carriersc) Can affect any aged) Secondary attack rate in unimmunised persons is 90%e) More common in summers

A study is to be conducted with regards to the fat content…

'There has been a gradual increase in number of non-communicable disease cases…

All of the following are done to remove Confounding except