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*Oral Polio Vaccine (OPV). This vaccine makes use of a live-attenuated form of the virus. It is administered orally, infects the host, and is spread in the same way as polio. It does not cause paralytic polio. One advantage of this vaccine is that it can "passively" vaccinate those who do not get vaccinated normally. Unfortunately, immunocompromised people can become quite ill from exposure, so this vaccine is largely being replaced in the US.
*Oral Polio Vaccine (OPV). This vaccine makes use of a live-attenuated form of the virus. It is administered orally, infects the host, and is spread in the same way as polio. It does not cause paralytic polio. One advantage of this vaccine is that it can "passively" vaccinate those who do not get vaccinated normally. Unfortunately, immunocompromised people can become quite ill from exposure, so this vaccine is largely being replaced in the US.
*Inactivated polio vaccine (IPV). This is an injected vaccine that is now widely used in the US.
*Inactivated polio vaccine (IPV). This is an injected vaccine that is now widely used in the US.
[[category:diseases]]