Many individuals consider vaccines a preventive miracle. Over time, vaccines have been developed and adjusted to help people live in a community in a safer way.
Sarah, a milkmaid, was infected with cowpox.
Vaccines strengthen immunity, are supported by the medical community, and consist of many types; however, they have many risks and limitations.
James, a teen boy, was exposed to smallpox.
The history of vaccinations began in 1796 when Edward Jenner used cowpox material to create vaccination against smallpox. There are four types of vaccinations, including live-attenuated, killed, subunit and toxoid.
James falls ill with a mild case of smallpox.
Among the many benefits of vaccinations, the most important ones are eradication of endemic diseases and providing herd immunity. Risks of vaccinations include short-term side effects, such as redness of the injection site, as well as allergy to vaccine components.
Pus is collected from the cowpox patient, Sarah.
There are several limitations to vaccines including pregnancy and low immunity. There are time restrictions, such as age or travel-dependent.
James is inoculated with cowpox from Sarah.
James develops immunity. He is protected.
The medical community supports vaccinations and approve these restrictions and limitations.