According to Vaccines.gov ---- A vaccine is a product that produces immunity from a disease and can be administered through needle injections, by mouth, or by aerosol. The FDA demands that vaccines undergo a rigorous and extensive development program in the laboratory, as well as in animal studies and human clinical trials, to determine their safety and effectiveness. Highly trained FDA scientists and clinicians carefully evaluate all of the information in a marketing application and make a determination whether to license (approve) a vaccine before it can be used in the United States. Prior to licensure, as part of FDA's evaluation, FDA takes all of the ingredients of a vaccine into account, including the active ingredients as well as other substances. After FDA approves a vaccine, FDA continuously monitors its safety. Now let's take a look at vaccinations. Vaccinations according to the World Health Organization (WHO) --- vaccination has greatly reduced the burden of infectious diseases. Vaccine safety gets more public attention than vaccination effectiveness, but independent experts and WHO have shown that vaccines are far safer than therapeutic medicines. Today vaccines have an excellent safety record and most "vaccine scares" have been shown to be false alarms. To get more in depth information on what a vaccine is and the benefits of vaccinations click on the pictures below to read the articles.
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