Changes

== Adverse Reactions ==

== Adverse Reactions ==

{{See also|Vaccine Injury Compensation Program|Vaccine Adverse Event Reporting System}}

{{See also|Vaccine Injury Compensation Program|Vaccine Adverse Event Reporting System}}

Vaccines are not completely harmless, and many have a significant morbidity and mortality associated with them. Postvaccinial encephalitis is a known hazard of [[smallpox]] vaccine, for example. A recently-introduced vaccine against [[human papilloma virus]], the [[causative agent]] of [[cancer]] of the [[uterus|uterine]] [[cervix]], has now been linked to a number of sudden deaths reported within days of its administration.<ref name=GardasilMM>Cockcroft, Lucy, "[http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2007/10/29/njab129.xml  Cervical cancer drug Gardasil linked to deaths]," ''[[London]] Daily Telegraph'', October 29, 2007. Retrieved November 10, 2007.</ref>

Vaccines are not completely harmless, and many have a significant morbidity and mortality associated with them. Postvaccinial encephalitis is a known hazard of [[smallpox]] vaccine, for example.

== See also ==

== See also ==