The same trick was used to improve Hib vaccine ten years ago, and has recently been used for pneumococcal vaccine.
Hyperthyroidism, whooping cough, chickenpox, measles, and Hib disease (a bacterial infection) may cause mental retardation if they are not treated adequately.
Immunization against diseases such as measles and Hib prevents many of the illnesses that can cause mental retardation.
Hib disease-An infection caused by Haemophilus influenza type b (Hib).
If a child has not been vaccinated, parents should talk to their doctor about the Hib and pneumococcal (Prevnar 7) vaccines.