Superinfection is infection of an already infected person by a more virulent strain of the infective agent, such as a virus. It counters the general principle in medicine that infection protects against infection -- that if a person with an infective disease, they is protected from contracting a worse form of that disease.


Superinfection has been documented for HIV in humans. It is likely to reduce the effectiveness of an eventual vaccine against AIDS.

Broader Problems:
Infectious diseases
Related Problems:
Risks of immunization
Problem Type:
E: Emanations of other problems
Date of last update
13.05.2019 – 18:05 CEST