Pertussis risk factors

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

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Overview

Children who are too young to be fully vaccinated and those who have not completed the primary vaccination series are at highest risk for severe illness. Like measles, pertussis is highly contagious with up to 90% of susceptible household contacts developing clinical disease following exposure to an index case. Adolescents and adults become susceptible when immunity wanes.

Risk Factors

• Being within 5 feet of contact of an individual who is infected
• Children are at more risk of acquiring infection
• Unvaccinated children
• Associated infections like measles
• Household contacts
• Immunodeficient conditions