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[[Polio]], for example, killed over 3,000 people in the United States in 1952 [http://www.cdc.gov/nchs/data/vsus/VSUS_1952_2.pdf], and afflicted such noted persons as President [[Franklin Delano Roosevelt]], actor Alan Alda, and musician Itzak Perlman. When doctors began using a vaccine to fight polio, it practically eradicated the disease in the developed world.  
 
[[Polio]], for example, killed over 3,000 people in the United States in 1952 [http://www.cdc.gov/nchs/data/vsus/VSUS_1952_2.pdf], and afflicted such noted persons as President [[Franklin Delano Roosevelt]], actor Alan Alda, and musician Itzak Perlman. When doctors began using a vaccine to fight polio, it practically eradicated the disease in the developed world.  
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Traditionally a few highly tested vaccines were mandatory for children to protect against deadly or severe diseases, such as [[smallpox]] and [[polio]]. In the 1990s, vaccine manufacturers began introducing and persuading states to require numerous additional vaccines for non-deadly and even sexually transmitted diseases. About one-third of the states have philosophical exemptions entitling parents to decline the vaccines; 48 out of 50 states have religious exemptions; all states have medical exemptions, but they are hardest to obtain.<ref>http://www.nvic.org/state-site/state-exemptions.htm</ref><ref>http://www.vaccinesafety.edu/cc-exem.htm</ref>
    
==Influenza Vaccine==
 
==Influenza Vaccine==
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