A vaccine is a biological preparation that aims to improve the activity of the immune system to a particular infection. A vaccine typically contains an agent that resembles a disease-causing germ, and is often composed weakened (attenuate) or killed forms of the microbe, its toxins or one of its surface proteinss, as isthe case in hepatitis B vaccine. . The agent triggers the body's immune system to recognize the agent as foreign, or enemy, destroy it, and "remember" it, so that incase of future encounters, the immune system can more easily andqquickly recognize and destroy any of these microbes, so only mild disease occurs.
Hepatitis B is a virus that infects the liver and can cause chronic liver disease and liver cancer; you receive 3 doses as a baby, then a booster shot (a dose to remind your immune system of how the virus looks like) as an adult if you are at risk of exposure to the virus, like working in a hospital or hospice with sick patients.
Hepatitis B infection is transmitted through contaminated needles or any other instruments that have gone into the blood of a person with the infection then goes into your bloodstream, like other sharp objects (blades for example). It's also transmitted in blood transfusion (contaminated blood from a donor) and through sexual intercourse.
Hepatitis B vaccine contains yeast (main ingredient) in addition to other components (like dextrose and amino acids). It's giveniin the muscles (intramuscular injection) and is not considered to carry a nutritional value. But since it's like a medication, you're not supposed to fast and receive the vaccine, especially that the injection may cause a local reaction in which case you may need medication for pain.
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It is recommended that all individuals see a Family Doctor for a full medical examination annually. Adults should get their blood pressure checked (US Preventive Task Force), a flu vaccine (CDC) and more each year.
The American Dental Association recommends dental cleanings for adults at least twice annually. Some stains can only be removed by a professional cleaning.
It’s recommended by the American Academy of Ophthalmology that every adult between the ages of 18 and 80 does an eye examination at least once every two years.
It's recommended by the American Cancer Association that every adult between the age of 20 and 80 does an annual skin screening by a licensed dermatologist.
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