Changes

2000</ref>.  Historical examples of successful vaccination programs include those for smallpox and polio.  Recently, vaccines have been used to deal with sexually transmitted diseases such as the [[HPV]] virus. Some Christian groups have objected to the use of such vaccines on the belief that it will encourage promiscuity in children.

2000</ref>.  Historical examples of successful vaccination programs include those for smallpox and polio.  Recently, vaccines have been used to deal with sexually transmitted diseases such as the [[HPV]] virus. Some Christian groups have objected to the use of such vaccines on the belief that it will encourage promiscuity in children.

Since doctors began using vaccines, however, many diseases have been curbed. [[Polio]], for example, killed over 3,000 people in the United States in 1952 [http://www.http://www.cdc.gov/nchs/data/vsus/VSUS_1952_2.pdf], and inflicted such noted persons as President [[Franklin Delanor Roosevelt]], actor [[Alan Alda]], and musician [[Itzak Perlman]]. When doctors began using a vaccine to fight polio, it more or less erradicated the disease in the developed world.  

Since doctors began using vaccines, however, many diseases have been curbed. [[Polio]], for example, killed over 3,000 people in the United States in 1952 [http://www.http://www.cdc.gov/nchs/data/vsus/VSUS_1952_2.pdf], and inflicted 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 erradicated the disease in the developed world.  

Other diseases that have been curbed since the invention of vaccines include [[smallpox]] (previously a yearly killer of thousands worldwide), [[chicken pox]], [[measles]], [[mumps]], [[rubella]], and [[typhoid]]. Because these diseases were prevalent before the use of vaccines and rare afterwards, many people believe that vaccines may have something to do with preventing the diseases, although correlation does not always necessarily imply causation.

Other diseases that have been curbed since the invention of vaccines include [[smallpox]] (previously a yearly killer of thousands worldwide), [[chicken pox]], [[measles]], [[mumps]], [[rubella]], and [[typhoid]]. Because these diseases were prevalent before the use of vaccines and rare afterwards, many people believe that vaccines may have something to do with preventing the diseases, although correlation does not always necessarily imply causation.