Which of the following is not true about Rubella?

Rubella is caused by RNA virus of Toga family. Source-only case. No carrier. Once infected provides life long immunity. Congenital infection :- Risk of transmission and severity is maximum in 1st trimester of pregnancy. After 5th month, therisk is negligible. Congenital rubella :- classical triad -ear defect,ocular defect,cardiac defect. Vaccination:- RA27/3 live attenuated .