Measles patients found in Mumbai are developing pneumonia four days after the infection. Earlier, it took at least 14 days. There has been a change in the disease pattern and there is a need for study on this, according to the experts present at the workshop organized by UNICEF and the Central Health and Family Welfare Department.

"There is a plan to conduct a serosurvey to find out about this changed pattern and whether the patient has developed immunity after recovery," said World Health Organisation surveillance officer Dr. Mita.