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• Immunization Terms

Immunization Related Terms

- E -

• Efficacy Rate

A measure used to describe how good a vaccine is at preventing disease.



• Encephalitis

Inflammation of the brain caused by a virus. Encephalitis can result in permanent brain damage or death.



• Encephalopathy

A general term describing brain dysfunction. Examples include encephalitis, meningitis, seizures and head trauma.



• Endemic

The continual, low-level presence of disease in a community.



• Epidemic

The occurrence of disease within a specific geographical area or population that is in excess of what is normally expected.



• Erythema Multiforme

A medical condition characterized by inflammation of the skin or mucous membranes (including the mouth, throat and eyes). Erthema Multiforme has been reported following infection. Symptoms persist anywhere from 2 days to 4 weeks and include skin lesions, blisters, itching, fatigue, joint pain and fever.



• Etiology

The cause of.



• Exposure

Contact with infectious agents (bacteria or viruses) in a manner that promotes transmission and increases the likelihood of disease.