Another immunisation which is given routinely in the USA where this illness has been eradicated because of the immunisation policy. This disease can cause an initial encephalitis and cerebellitis chest and ear infection. In the longer term the illness tends to worse with age and children who have had chickenpox are at lifelong risk of shingles which can be extremely debilitating. If a mother has not had chickenpox in the first 3 month of her pregnancy then her child is at risk of developing congenital infection.
