Changes

Since the adoption of mass vaccination programs, many diseases have been curbed. [[Smallpox]], a contagious disease that killed 30 percent of those it infected, has been entirely eliminated through vaccination, excepting some strains maintained in labs for research purposes. Vaccination programs of the 19th and 20th century were effective at curbing the disease, and in 1979 the World Health Organization declared smallpox to be eradicated.<ref>https://www.cdc.gov/smallpox/history/history.html</ref>

Since the adoption of mass vaccination programs, many diseases have been curbed. [[Smallpox]], a contagious disease that killed 30 percent of those it infected, has been entirely eliminated through vaccination, excepting some strains maintained in labs for research purposes. Vaccination programs of the 19th and 20th century were effective at curbing the disease, and in 1979 the World Health Organization declared smallpox to be eradicated.<ref>https://www.cdc.gov/smallpox/history/history.html</ref>

Another disease that has been eliminated from the US is [[Polio]], which killed over 3,000 people in the United States in 1952,<ref>http://www.cdc.gov/nchs/data/vsus/VSUS_1952_2.pdf</ref> 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.<ref>https://www.cdc.gov/polio/progress/index.htm</ref>

Another disease that has been eliminated from the US is [[Polio]], which killed over 3,000 people in the United States in 1952,<ref>https://www.cdc.gov/nchs/data/vsus/VSUS_1952_2.pdf</ref> 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.<ref>https://www.cdc.gov/polio/progress/index.htm</ref>

The incidence of other diseases such as [[diphtheria]], [[pertussis]], and [[measles]], has decreased greatly from improvements in sanitation, increased awareness of the benefits of hand-washing and other preventive measures, and the invention of vaccines against these diseases.<ref>https://www.unicef.org/pon96/hevaccin.htm</ref>

The incidence of other diseases such as [[diphtheria]], [[pertussis]], and [[measles]], has decreased greatly from improvements in sanitation, increased awareness of the benefits of hand-washing and other preventive measures, and the invention of vaccines against these diseases.<ref>https://www.unicef.org/pon96/hevaccin.htm</ref>

==Influenza Vaccine==

==Influenza Vaccine==

The flu vaccine is an example of modern vaccination. Due to the change in [[allele]] frequency over time in the population of the influenza virus, new influenza vaccines are created each year.  In some years the vaccines are less effective than in other years. According to the [http://www.cdc.gov/ CDC],<ref>"Inactivated Influenza Vaccine, What you need to know," a publication of the Center for Disease Control, 2006. Available online at: http://www.cdc.gov/nip/publications/VIS/vis-flu.pdf</ref>  

The flu vaccine is an example of modern vaccination. Due to the change in [[allele]] frequency over time in the population of the influenza virus, new influenza vaccines are created each year.  In some years the vaccines are less effective than in other years. According to the [https://www.cdc.gov/ CDC],<ref>"Inactivated Influenza Vaccine, What you need to know," a publication of the Center for Disease Control, 2006. Available online at: https://www.cdc.gov/nip/publications/VIS/vis-flu.pdf</ref>  

<blockquote>

<blockquote>

Influenza viruses are always changing. Therefore, influenza vaccines are updated every year, and an annual vaccination is recommended.

Influenza viruses are always changing. Therefore, influenza vaccines are updated every year, and an annual vaccination is recommended.

The USA has federal vaccination recommendations according to an official CDC schedule. Requirements are up to the states. Most states have medical and religious exemptions. Some states make it very easy to opt out of vaccines, while other states strictly enforce compliance for school attendance. The difference in vaccination rates between these states is actually very slight, and usually not nearly enough to affect herd immunity.{{cn}}

The USA has federal vaccination recommendations according to an official CDC schedule. Requirements are up to the states. Most states have medical and religious exemptions. Some states make it very easy to opt out of vaccines, while other states strictly enforce compliance for school attendance. The difference in vaccination rates between these states is actually very slight, and usually not nearly enough to affect herd immunity.{{cn}}

As of February 2008, the CDC noted that "fewer than 100 measles cases are now reported annually in the United States and virtually all of those are linked to imported cases" in which someone is infected during overseas travel. The USA maintains herd immunity for measles, even in states where it is easy to opt out of vaccination requirements.<ref>[http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5708a3.htm]</ref> Measles can be serious; according to an article in The Times, "About one in every 15 children has complications that can include [[meningitis]], [[pneumonia]], [[fits]], [[encephalitis]] (swelling of the brain), [[blindness]] and [[brain damage]]."<ref>The Sunday Times, ''How the MMR scare led to the return of measles'', February 8, 2009 [http://www.timesonline.co.uk/tol/life_and_style/health/article5683687.ece]</ref> In the England and Wales, there were 1,348 cases of measles in 2008; two children died of the disease.<ref>The Sunday Times, ''MMR doctor Andrew Wakefield fixed data on autism'', by Brian Deer, February 8, 2009 [http://www.timesonline.co.uk/tol/life_and_style/health/article5683671.ece]</ref>

As of February 2008, the CDC noted that "fewer than 100 measles cases are now reported annually in the United States and virtually all of those are linked to imported cases" in which someone is infected during overseas travel. The USA maintains herd immunity for measles, even in states where it is easy to opt out of vaccination requirements.<ref>[https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5708a3.htm]</ref> Measles can be serious; according to an article in The Times, "About one in every 15 children has complications that can include [[meningitis]], [[pneumonia]], [[fits]], [[encephalitis]] (swelling of the brain), [[blindness]] and [[brain damage]]."<ref>The Sunday Times, ''How the MMR scare led to the return of measles'', February 8, 2009 [http://www.timesonline.co.uk/tol/life_and_style/health/article5683687.ece]</ref> In the England and Wales, there were 1,348 cases of measles in 2008; two children died of the disease.<ref>The Sunday Times, ''MMR doctor Andrew Wakefield fixed data on autism'', by Brian Deer, February 8, 2009 [http://www.timesonline.co.uk/tol/life_and_style/health/article5683671.ece]</ref>

The CDC notes that when a measles outbreak occurs, the cost to taxpayers can be substantial. Public health responsibilities include "identification of cases, isolation of patients and vaccination, administration of [[immune globulin]], and voluntary quarantine of contacts who have no evidence of measles immunity...In Iowa, the public health response to one imported measles case cost approximately $150,000."<ref>Centers for Disease Control and Prevention, Morbidity and Mortality Weekly Report, ''Outbreak of Measles --- San Diego, California, January--February 2008'', February 29, 2008 [http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5708a3.htm]</ref>

The CDC notes that when a measles outbreak occurs, the cost to taxpayers can be substantial. Public health responsibilities include "identification of cases, isolation of patients and vaccination, administration of [[immune globulin]], and voluntary quarantine of contacts who have no evidence of measles immunity...In Iowa, the public health response to one imported measles case cost approximately $150,000."<ref>Centers for Disease Control and Prevention, Morbidity and Mortality Weekly Report, ''Outbreak of Measles --- San Diego, California, January--February 2008'', February 29, 2008 [https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5708a3.htm]</ref>

Other diseases besides the measles have also started not only to reappear but also to kill children. Hib (''[[Haemophilus influenzae]]'' type B) meningitis recently killed an infant in Minnesota. The child who died had not been vaccinated. Two others who had been either partially, but not fully, vaccinated, or who had an immune deficiency became seriously ill. The vaccine for Hib is less than twenty years old, but this is the first death due to the disease in the state of Minnesota since the vaccine was introduced.<ref>[http://children.webmd.com/vaccines/news/20090123/hib-outbreak-kills-unvaccinated-child Hib Outbreak Kills Unvaccinated Child]</ref>

Other diseases besides the measles have also started not only to reappear but also to kill children. Hib (''[[Haemophilus influenzae]]'' type B) meningitis recently killed an infant in Minnesota. The child who died had not been vaccinated. Two others who had been either partially, but not fully, vaccinated, or who had an immune deficiency became seriously ill. The vaccine for Hib is less than twenty years old, but this is the first death due to the disease in the state of Minnesota since the vaccine was introduced.<ref>[http://children.webmd.com/vaccines/news/20090123/hib-outbreak-kills-unvaccinated-child Hib Outbreak Kills Unvaccinated Child]</ref>

This is what the CDC and medical journals claim:

This is what the CDC and medical journals claim:

*The Hepatitis B Vaccine (HBV) has a .000167% chance of causing [[anaphylaxis]] upon vaccination.<ref>[http://www.cdc.gov/mmwr/preview/mmwrhtml/00046738.htm]</ref>  

*The Hepatitis B Vaccine (HBV) has a .000167% chance of causing [[anaphylaxis]] upon vaccination.<ref>[https://www.cdc.gov/mmwr/preview/mmwrhtml/00046738.htm]</ref>  

*There is no correlation between the HBV and multiple sclerosis.<ref>[http://www.medsafe.govt.nz/Profs/PUarticles/vaccinenews.htm]</ref>

*There is no correlation between the HBV and multiple sclerosis.<ref>[http://www.medsafe.govt.nz/Profs/PUarticles/vaccinenews.htm]</ref>

*The Measles, Mumps, Rubbela (MMR) vaccine has a 25% chance of causing [[arthralgia]] (joint pain) and 10% chance of causing [[arthritis]]-like symptoms in women who are past puberty. This pain and stiffness begins 1–3 weeks after vaccination, persisting for 1 day to 3 weeks.<ref>[http://www.cdc.gov/vaccines/vpd-vac/combo-vaccines/mmr/faqs-mmr-hcp.htm]</ref>

*The Measles, Mumps, Rubbela (MMR) vaccine has a 25% chance of causing [[arthralgia]] (joint pain) and 10% chance of causing [[arthritis]]-like symptoms in women who are past puberty. This pain and stiffness begins 1–3 weeks after vaccination, persisting for 1 day to 3 weeks.<ref>[https://www.cdc.gov/vaccines/vpd-vac/combo-vaccines/mmr/faqs-mmr-hcp.htm]</ref>

*The MMR vaccine has a .00484% chance of causing [[thrombocytopenia]]. However, the measles and rubella both have much higher chances of causing thrombocytopenia.<ref>[http://adc.bmj.com/cgi/content/full/84/3/227 E Miller et al., Idiopathic thrombocytopenic purpura and MMR vaccine in ''Archives of Disease In Childhood'', 84:227-229]</ref>

*The MMR vaccine has a .00484% chance of causing [[thrombocytopenia]]. However, the measles and rubella both have much higher chances of causing thrombocytopenia.<ref>[http://adc.bmj.com/cgi/content/full/84/3/227 E Miller et al., Idiopathic thrombocytopenic purpura and MMR vaccine in ''Archives of Disease In Childhood'', 84:227-229]</ref>