Hepatitis A vaccine: Difference between revisions

Latest revision as of 11:05, 15 February 2025

Hepatitis A Vaccine[edit]

The Hepatitis A vaccine is a vaccine that prevents hepatitis A. Hepatitis A is a highly contagious liver infection caused by the hepatitis A virus (HAV). The vaccine is effective in preventing the disease and is recommended for all children, travelers to certain countries, and others at risk.

History[edit]

The development of the hepatitis A vaccine began in the 1970s, with the first vaccines being licensed in the 1990s. The vaccine has significantly reduced the incidence of hepatitis A in countries where it is routinely administered.

Types of Vaccines[edit]

There are two main types of hepatitis A vaccines:

Inactivated (killed) vaccines: These vaccines contain inactivated hepatitis A virus. Examples include Havrix and Vaqta.
Live attenuated vaccines: These vaccines contain a live but weakened form of the virus. They are less commonly used.

Administration[edit]

The hepatitis A vaccine is typically administered as an injection into the muscle. It is given in two doses, with the second dose administered 6 to 12 months after the first. This schedule provides long-term protection against the virus.

Effectiveness[edit]

The vaccine is highly effective, with more than 95% of individuals developing protective antibodies after the first dose. The second dose ensures long-term protection, potentially lasting a lifetime.

Side Effects[edit]

Common side effects of the hepatitis A vaccine include soreness at the injection site, headache, and fatigue. Serious side effects are rare.

Recommendations[edit]

The Centers for Disease Control and Prevention (CDC) recommends the hepatitis A vaccine for:

All children at age 1 year
Travelers to countries where hepatitis A is common
Men who have sex with men
Users of recreational drugs
People with chronic liver disease
People with clotting-factor disorders
People who work with hepatitis A virus in research settings

Related Pages[edit]

@@ Line 1: / Line 1: @@
-'''Hepatitis A vaccine''' is a vaccine that prevents [[hepatitis A]]. It is effective in around 95% of cases and lasts for at least fifteen years and possibly a person's entire life. If given, two doses are recommended beginning after the age of one. It is given by injection into a muscle.
+== Hepatitis A Vaccine ==
-==Effectiveness==
+[[File:Havrix-rokote.jpg|thumb|right|Havrix, a brand of Hepatitis A vaccine]]
-The Hepatitis A vaccine is highly effective. It produces protective levels of antibodies against hepatitis A in over 95% of people who complete the two-dose vaccination schedule. The level of protection achieved by vaccination is similar to that provided by having had a natural infection.
-==Usage==
+The '''Hepatitis A vaccine''' is a vaccine that prevents [[hepatitis A]]. Hepatitis A is a highly contagious liver infection caused by the [[hepatitis A virus]] (HAV). The vaccine is effective in preventing the disease and is recommended for all children, travelers to certain countries, and others at risk.
-The [[World Health Organization]] (WHO) recommends routine vaccination in areas where the disease is common and in those who are at high risk. This includes those who have not previously been vaccinated and who have chronic liver disease, clotting-factor disorders, men who have sex with men, and those who use street drugs.
-==Side Effects==
+== History ==
-Common side effects include soreness at the injection site, headache, and feeling tired, while severe allergic reactions are very rare.
-==History==
+The development of the hepatitis A vaccine began in the 1970s, with the first vaccines being licensed in the 1990s. The vaccine has significantly reduced the incidence of hepatitis A in countries where it is routinely administered.
-The first inactivated hepatitis A vaccine was approved in the United States in 1995. A live attenuated vaccine is also available in China. The [[Global Vaccine Action Plan]] (GVAP) – led by the [[Bill & Melinda Gates Foundation]], [[WHO]], [[UNICEF]], and others – has the goal of reaching 90% of children with the two-dose hepatitis A vaccine by 2020.
-==See Also==
+== Types of Vaccines ==
-* [[Hepatitis A]]
-* [[Hepatitis B vaccine]]
+There are two main types of hepatitis A vaccines:
-* [[Hepatitis C vaccine]]
+* '''Inactivated (killed) vaccines''': These vaccines contain inactivated hepatitis A virus. Examples include Havrix and Vaqta.
+* '''Live attenuated vaccines''': These vaccines contain a live but weakened form of the virus. They are less commonly used.
+== Administration ==
+The hepatitis A vaccine is typically administered as an injection into the muscle. It is given in two doses, with the second dose administered 6 to 12 months after the first. This schedule provides long-term protection against the virus.
+== Effectiveness ==
+The vaccine is highly effective, with more than 95% of individuals developing protective antibodies after the first dose. The second dose ensures long-term protection, potentially lasting a lifetime.
+== Side Effects ==
+Common side effects of the hepatitis A vaccine include soreness at the injection site, headache, and fatigue. Serious side effects are rare.
+== Recommendations ==
+The [[Centers for Disease Control and Prevention]] (CDC) recommends the hepatitis A vaccine for:
+* All children at age 1 year
+* Travelers to countries where hepatitis A is common
+* Men who have sex with men
+* Users of recreational drugs
+* People with chronic liver disease
+* People with clotting-factor disorders
+* People who work with hepatitis A virus in research settings
-==References==
+== Related Pages ==
-<references />
-{{stub}}
+* [[Hepatitis A]]
+* [[Vaccine]]
+* [[Liver disease]]
+* [[Centers for Disease Control and Prevention]]
 [[Category:Vaccines]]
-[[Category:Hepatitis A]]
+[[Category:Hepatitis]]
-[[Category:World Health Organization]]
-[[Category:Bill & Melinda Gates Foundation]]
-[[Category:UNICEF]]
-[[Category:Global Vaccine Action Plan]]