Severe rash on people with eczema (as many as 1 per 26,000).Rash on entire body (as many as 1 per 4,000).Serious eye infection, or loss of vision, due to spread of vaccine virus to the eye.Secondary blister elsewhere on the body (about 1 per 1,900).Fever of over 100☏ (about 70% of children, 17% of adults) or over 102☏ (about 15%-20% of children, under 2% of adults).Swelling and tenderness of lymph nodes, lasting 2-4 weeks after the blister has healed.No serious side effects have been related to the Hib vaccine. Fever over 101☏ (up to 1 out of 20 children).Redness, warmth, or swelling where the shot was given (up to 1 out of 4 children).The information below about side effects of Hib and smallpox vaccination is from the Centers for Disease Control and Prevention. The World Health Organization has declared it eradicated. Since the 1970s, no wild smallpox cases have been reported. Smallpox is a serious infection, fatal in 30% to 40% of cases, and caused by the Variola major or Variola minor virus. The CDC recommends children receive a series of Hib vaccinations starting when they are two months old. Haemophilus influenza type B is a bacterium that can cause serious infections, including meningitis, pneumonia, epiglottitis, and sepsis. To understand the range of possible vaccination side effects events, it is useful to compare a vaccine with relatively few associated side effects, such as the vaccine for Haemophilus influenza type B, with a vaccine known to have many potential side effects, such as the infrequently used smallpox vaccine (given to military personnel and others who might be first responders in the event of a bio-terror attack). The Food and Drug Administration (FDA) and the Centers for Disease Control and Prevention (CDC) have set up systems to monitor and analyze reported adverse events and determine whether they are likely related to vaccination. The challenge is to determine when a medical event is directly related to a vaccination. This does not mean, though, that the event is actually related to the immunization. Therefore, due to chance alone, many babies will experience a medical event in close proximity to a vaccination. Additionally, congenital conditions may become evident during the first year. ![]() During the first year of life, many babies suffer serious, life-threatening illnesses and medical events, such as Sudden Infant Death Syndrome (SIDS). Serious side effects are rare, but may include seizure or life-threatening allergic reaction.Ī possible side effect resulting from a vaccination is known as an adverse event.Įach year, American babies (1 year old and younger) receive more than 10 million vaccinations. Some vaccines are associated with fever, rash, and achiness. Most side effects from vaccination are mild, such as soreness, swelling, or redness at the injection site. Vaccines, though designed to protect from disease, can cause side effects, just as any medication can.
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