Editing Polio vaccine (section)

===Inactivated===
When the IPV (injection) is used, 90% or more of individuals develop protective antibodies to all three [[serotype]]s of poliovirus after two doses, and at least 99% are immune following three doses. The duration of immunity induced by IPV is not known with certainty, although a complete series is thought to protect for many years.<ref name=Robertson_1993>{{cite book | vauthors = Robertson S | title = Module 6: Poliomyelitis | series = The Immunological Basis for Immunization Series | publisher = [[World Health Organization]] (WHO) | url = https://www.who.int/ihr/polio1993en.pdf | access-date = 18 October 2019 |archive-url=https://web.archive.org/web/20191019064736/https://www.who.int/ihr/polio1993en.pdf |archive-date=19 October 2019 | id = WHO/EPI/GEN/93.16 }}</ref> IPV replaced the oral vaccine in many developed countries in the 1990s mainly due to the (small) risk of vaccine-derived polio in the oral vaccine.<ref>{{Cite web|author=Public Health Agency of Canada|date=18 July 2007|title=Poliomyelitis vaccine: Canadian Immunization Guide|url=https://www.canada.ca/en/public-health/services/publications/healthy-living/canadian-immunization-guide-part-4-active-vaccines/page-17-poliomyelitis-vaccine.html|access-date=1 August 2021|website=www.canada.ca|archive-date=27 July 2021|archive-url=https://web.archive.org/web/20210727212739/https://www.canada.ca/en/public-health/services/publications/healthy-living/canadian-immunization-guide-part-4-active-vaccines/page-17-poliomyelitis-vaccine.html|url-status=live}}</ref><ref>{{Cite web|date=25 March 2021|title=Polio Vaccination: What Everyone Should Know {{!}} CDC|url=https://www.cdc.gov/vaccines/vpd/polio/public/index.html|access-date=1 August 2021|website=www.cdc.gov|language=en-us|archive-date=16 January 2021|archive-url=https://web.archive.org/web/20210116130844/https://www.cdc.gov/vaccines/vpd/polio/public/index.html|url-status=live}}</ref>