Booster dose just two booster shots within the first 20 years of life, but no booster after a third decade. Neonatal tetanus is a concern during pregnancy for some women, and mothers are recommended a booster against tetanus during their pregnancy in order to protect their child against the disease. Whooping cough, also called pertussis, is a contagious disease that affects the respiratory tract. The infection is caused by a bacterium that sticks to the cilia of the lungs, and can be very contagious. Pertussis can be especially dangerous for babies, whose immune system are not yet fully developed, and can develop
Tay–Sachs disease Researchers are looking at gene therapy or enzyme replacement therapy as possible treatments. Tay–Sachs disease is typically first noticed in infants around 6 months old displaying an abnormally strong response to sudden noises or other stimuli, known as the "startle response". There may also be listlessness or muscle stiffness (hypertonia). The disease is classified into several forms, which are differentiated based on the onset age of neurological symptoms. Until the 1970s and 1980s, when the disease's molecular genetics became known, the juvenile and adult forms of the disease were not always recognized as variants of Tay–Sachs disease. Post-infantile Tay–Sachs was