Answer : 4. "Measles"
Explanation :

Solution: In 2022, an estimated 11 lakh children in India will miss the crucial first dose of measles vaccine. According to the CDC-WHO report, India is among 37 countries that saw large or disruptive outbreaks in 2022, with around 40,967 measles cases recorded. This puts India among the 10 countries with the highest number of children who did not receive the first vaccine.