<unk> s are vaccines against the bacterium Streptococcus pneumoniae. Their use can prevent some cases of pneumonia, meningitis, and sepsis. There are two types of<unk> s: conjugate vaccines and polysaccharide vaccines. They are given by injection either into a muscle or just under the skin. The World Health Organization (WHO) recommends the use of the conjugate vaccine in the routine immunizations given to children. This includes those with HIV/AIDS. The recommended three or four doses are between 71 and 93% effective at preventing severe<unk>  disease. The polysaccharide vaccines, while effective in healthy adults, are not effective in children less than two years old or those with poor immune function. These vaccines are generally safe. With the conjugate vaccine about 10% of babies develop redness at the site of injection, fever, or change in sleep. Severe allergies are very rare. The first<unk>  was developed in the 1980s. It is on the World Health Organization's List of Essential Medicines.
Pneumococcal vaccine
Meningococcal vaccine
Pertussis vaccine
Diphtheria vaccine
Tetanus vaccine
Measles vaccine
Typhoid vaccine
Mumps vaccine