In today’s world vaccines are mandatory for all babies and school-aged children who plan to actually attend school and college in the United States. There are several Pro’s and Con’s but for the purpose of this paper I am going to stick with 2 of each. The pros of vaccines are one that the ingredients, such as thimerosal, formaldehyde, and aluminum, can be harmful in large doses but they are not used in harmful quantities in vaccines. Children are exposed to more aluminum in breast milk and infant