Vaccination is the injection of a dead or weakened infectious organism in order to prevent the disease. This limited exposure to the pathogen is intended to cause the patient's body to react and create antibodies, but not actually become ill. In the United States and throughout the modern world, parents routinely get their children vaccinated to ward off measles and several other diseases which most people in the 21st century have never heard of.
In rare cases, vaccinations have side effects. Particularly new and untested vaccinations tend to be unpopular, and controversies have developed over whether the government has the right to vaccinate schoolchildren against the parents' wishes.
Some people are hesitant to take them due to toxins and unhealthy substances which are in vaccines. Some contain some of what seem to be the strangest ingredients, such as Monosodium Glutamate (classified as an Excitotoxin), aspartame (artificial sweetener), formaldehyde, and aborted human fetal tissue (for diploid cells, etc.)  Others avoid them because some research has shown that they drastically increase the risk of autism. Although this latter claim has been countered by some conflicting research, many still consider this to be a risk. Some vaccines contain (or formerly contained) thimerosal, which contains mercury; this was one of the main reasons a link to autism was suspected. Still more individuals avoid them for religious reasons. Those who stay away from the vaccine often seem to avoid getting that disease by using natural means, like Vitamin D supplementation  or the use of other natural treatments.
Common or routine vaccines exist for: chicken pox, diptheria, influenza (select strains only), etc.
- Hull, Janet. "Toxins In Vaccines." Toxins In Vaccines. Web. 3 Dec. 2015. <http://www.janethull.com/newsletter/0706/aspartame_in_the_pink_packet.php>.
- Heyes. "Whistleblower Goes Public: CDC Buried Data Showing Vaccines Increase Risk of Autism by 340%." Natural News. 21 Aug. 2014. Web. 3 Dec. 2015. <http://www.naturalnews.com/046552_MMR_vaccine_autism_CDC_whistleblower.html>.
- Biggar, Allison. "How to Prevent and Cure the Flu Naturally without a Vaccine." NaturalNews. 20 Nov. 2009. Web. 3 Dec. 2015. <http://www.naturalnews.com/027542_flu_cures_remedies.html>.
- The Vaccine Controversy: The History, Use, And Safety Of Vaccinations