COMVAX Injection 0.5 mL Injection
RxNorm 798443

Haemophilus influenzae type b (Hib) Vaccine

Why get vaccinated? Haemophilus influenzae type b (Hib) disease is a serious disease caused by bacteria. It usually affects children under 5 years old. It can also affect adults with certain medical conditions. Your child can get Hib disease by being around other children or adults who may have the bacteria and not know it. The germs spread from person to person. If the germs stay in the child's nose and throat, the child probably will not get sick. But sometimes the germs spread into the lungs or the bloodstream, and then Hib can cause serious problems. This is called invasive Hib disease. Before Hib vaccine, Hib disease was the leading cause of bacterial meningitis among children under 5 years old in the United States. Meningitis is an infection of the lining of the brain and spinal cord. It can lead to brain damage and deafness. Hib disease can also cause: pneumonia severe swelling in the throat, making it hard to breathe infections of the blood, joints, bones, and covering of the heart death Before Hib vaccine, about 20,000 children in the United States under 5 years old got Hib disease each year, and about 3 to 6% of them died. Hib vaccine can prevent Hib disease. Since use of Hib vaccine began, the number of cases of invasive Hib disease has decreased by more than 99%. Many more children would get Hib disease if we stopped vaccinating.
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Hepatitis B Vaccine

Why get vaccinated against hepatitis B? Hepatitis B is a serious infection that affects the liver. It is caused by the hepatitis B virus. Hepatitis B can cause mild illness lasting a few weeks, or it can lead to a serious, lifelong illness. Hepatitis B virus infection can be either acute or chronic. Acute hepatitis B virus infection is a short-term illness that occurs within the first 6 months after someone is exposed to the hepatitis B virus. This can lead to: fever, fatigue, loss of appetite, nausea, and/or vomiting jaundice (yellow skin or eyes, dark urine, clay-colored bowel movements) pain in muscles, joints, and stomach Chronic hepatitis B virus infection is a long-term illness that occurs when the hepatitis B virus remains in a person's body. Most people who go on to develop chronic hepatitis B do not have symptoms, but it is still very serious and can lead to: liver damage (cirrhosis) liver cancer death Chronically infected people can spread hepatitis B virus to others, even if they do not feel or look sick themselves. Up to 1.4 million people in the United States may have chronic hepatitis B infection. About 90% of infants who get hepatitis B become chronically infected, and about 1 out of 4 of them dies. Hepatitis B is spread when blood, semen, or other body fluid infected with the hepatitis B virus enters the body of a person who is not infected. People can become infected with the virus through: birth (a baby whose mother is infected can be infected at or after birth) sharing items such as razors or toothbrushes with an infected person contact with the blood or open sores of an infected person sex with an infected partner sharing needles, syringes, or other drug-injection equipment exposure to blood from needlesticks or other sharp instruments Each year about 2,000 people in the United States die from hepatitis B–related liver disease. Hepatitis B vaccine can prevent hepatitis B and its consequences, including liver cancer and cirrhosis.
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