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Latin word for cow, vacca, because of the smallpox/cowpox work of edward jenner, vaccination is the administration of a substance, live organism or otherwise, that stimulates the immune response to prevent a specific disease. Primarily a preventative procedure, some vaccines can ...Read more
Yes: Vaccination programs are one of the biggest success stories in medicine in terms of impact on health and mortality rates. Vaccinations have wiped out smallpox, reduced global polio by 99%, and are estimated to save 2 million lives every year from death secondary to preventable infectious disease. Few if any medications can claim such success. ...Read moreSee 2 more doctor answers
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Biological memory: For some viral germs like measles that never change, the body holds memory of which antibodies to make to prevent it for decades if not a lifetime. Shots for some bacteria like tetanus, seem to do this for up to 10 years.Some germs like the flu adapt/change their form every year or 2 and yearly vaccines are more helpful. That is the wondrous way a healthy body works. ...Read moreSee 2 more doctor answers
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