Amid clamour among experts for a serosurvey to gauge the spread of measles in the city and the state, state measles task force chief Dr Subhash Salunkhe said that there is no need for a serosurvey yet. He added that the focus is on early diagnosis, treatment and vaccination of children from around 3 lakh homes in high-risk zones. 

Mumbai witnessed 17 measles outbreaks and 90 confirmed cases till October this year. Then there was a surge as the city reported 400 new cases in the past 40 days. There were nine confirmed and five suspected measles deaths during the same period.