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[[Image:Vaccine.jpg|right|thumb|350px|[[Avian flu]] vaccine development]]

[[Image:Vaccine.jpg|right|thumb|350px|[[Avian flu]] vaccine development]]

A '''vaccine''' is a pharmaceutical product containing an [[antigen]] designed to stimulate the production of antibodies against a particular disease or diseases.<ref>https://www.sciencenewsforstudents.org/article/explainer-what-vaccine</ref> There are numerous reasons why many people prefer to avoid taking vaccines, but laws and other rules (often pushed into place by those who stand to make significant profit) frequently mandate them.  The Pfizer and Moderna [[COVID]] vaccines use an mRNA to trick the recipient's cells into generating a SARS-Cov-2 spike protein, in order to improve the immune systems response to the disease. This differs from how most traditional vaccines inject an inactivated virus itself.<ref>https://www.menshealth.com/health/a35589366/mrna-vs-traditional-vaccine/</ref> Other covid vaccines, such as the one produced by Johnson and Johnson, use a more traditional method. Immunization has enabled the global eradication of smallpox ... the elimination of poliomyelitis from the Western hemisphere … and major reductions in the incidence of other vaccine-preventable diseases in the United States.<ref> [https://www.cdc.gov/mmwr/pdf/rr/rr4512.pdf CDC].</ref>  

A '''vaccine''' is a pharmaceutical product containing an [[antigen]] designed to stimulate the production of antibodies against a particular disease or diseases.<ref>https://www.sciencenewsforstudents.org/article/explainer-what-vaccine</ref> There are numerous reasons why many people prefer to avoid taking vaccines, but laws and other rules (often pushed into place by those who stand to make significant profit) frequently mandate them.  The Pfizer and Moderna [[COVID]] vaccines use an mRNA to trick the recipient's cells into generating a SARS-Cov-2 spike protein, in order to improve the immune systems response to the disease. This differs from how most traditional vaccines inject an inactivated virus itself.<ref>https://www.menshealth.com/health/a35589366/mrna-vs-traditional-vaccine/</ref> Other covid vaccines, such as the one produced by Johnson and Johnson, employ the more traditional viral vecto method, which uses "live, yet weakened pathogen".<ref>[https://medicalaid.org/johnson-johnson-covid-19-vaccine-what-you-need-to-know/?gclid=EAIaIQobChMI3JbUysuO9gIVXnZvBB1d3AcSEAAYAyAAEgLQnPD_BwE International Medical Aid ,March 23, 2021]</ref> Immunization has enabled the global eradication of smallpox ... the elimination of poliomyelitis from the Western hemisphere … and major reductions in the incidence of other vaccine-preventable diseases in the United States.<ref> [https://www.cdc.gov/mmwr/pdf/rr/rr4512.pdf CDC].</ref>  

Vaccine manufacturers admit to rare cases of severe harms caused by their products, in their packaging information.

Vaccine manufacturers admit to rare cases of severe harms caused by their products, in their packaging information.

==Mechanism==

==Mechanism==