health concerns

Understanding Vaccines

Diphtheria is a serious bacterial infection that causes a thick membrane to form in the nose, throat or airway. The membrane is attached to underlying tissues, so that attempting to remove it causes bleeding. Diphtheria bacteria within the membrane produce a toxin that can damage heart, liver, kidney and nerve tissue. Paralysis and death may result. Because of widespread vaccinations, fewer than five cases occur in the U.S. each year.

Pertussis (whooping cough) causes severe coughing, often to the point of choking. It can last for months. It is particularly rough on infants and small children and can lead to pneumonia, seizures and death. This disease is highly contagious and much more common than diphtheria. About 4,000 cases are reported each year, half of which involve children less than a year old.

Tetanus results from a toxin produced by bacteria that enter the body through contaminated wounds. The toxin causes painful, spasmodic contractions of muscles (which gave rise to the colloquial term "lockjaw" for this disease) and can lead to death.

Polio is a viral infection that damages the central nervous system; it can cause mild or serious paralysis and results in death in five to 10 percent of cases.

Hemophilus B is a type of bacteria that can cause, among other things, pneumonia and meningitis (an infection of the membranes that enclose the brain and spinal cord). Since the introduction of hemophilus B vaccines during the past decade, the number of cases of meningitis in young children caused by this bacteria has fallen dramatically.

Hepatitis B is an infection of the liver caused by a virus that is most commonly transmitted in three ways: from an infected mother to her infant, (later in life) through sexual contact with an infected person or by exposure to infected blood. However, a large number of cases occur without a history of any of these events, which is one reason health officials recommend universal vaccination against this virus.

Fortunately, most people infected with hepatitis B recover without any long-term effects. In a small percentage of cases, however, the immediate illness can be severe enough to cause death. In others, prolonged active infection with the virus occurs, a process that can lead eventually to cirrhosis and cancer of the liver. While hepatitis B is not a common childhood disease, children are at a higher risk for developing long-term complications if they should become infected. Immunization of all children has been recommended as the most effective means to reduce the total number of cases of this disease over the next several years.

Background Information

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Questions and Answers

I'm trying to potty train my 3-year-old son who has Down syndrome. Does he have the capacity to understand at this age, considering his challenges?
Answer

Review Frequently Asked Questions

Stories

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If you've been through a experience related to this topic, we invite you to share your story with others.
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