IPD stands for “Invasive Pneumococcal disease” caused by bacteria called Streptococcus pneumoniae. It is a serious infection that can spread to many organs. This type of infection is rare but it is more serious than just a simple pneumococcal infection which only causes common cold, middle ear infection, sinus infection, and lung inflammation. However, with IPD, the pneumococcal bacteria enters the body through the lining of the respiratory tract into the blood stream, causing bacteremia .The Infection may spread to the cortex causing meningitis, or to other organs such as bone and joint, causing inflammation in those areas. This disease is well known in the medical circle for a long time and is often found in infants and young children (2 months to 9 years old), may consequently cause the patient to have a severe disability or death.