<prompt> If a mother has had measles, her newborn baby is immune to this disease for -4 to 6 month6 to 12 months1 to 3 years3 to 6 years  <response>: Infants are protected from measles by maternal antibodies up to 6 months pf age. Ref: PARK;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition pg 147 