Kolandaisamy added that 95 per cent of rubella cases, also known as German measles, a mild virus, are being seen in the 9 months to 15-year age group. “In pregnant women, the rubella could lead to congenital defects in the child. Though we don’t have exact numbers, congenital rubella syndrome is evidently prevalent. Therefore, we are tackling it on a war footing by administering the vaccine to girls and boys as well for the future. In April and May, when measles is common, we expect to see a further reduction in the number of cases this year,” he added.