HIV/AIDS Types  
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Introduction to HIV types, groups and subtypes
HIV is a highly variable virus which mutates very readily. This means there are many different strains of HIV, even within the body of a single infected person.

HIV types
HIV type O and viral diversity.

HIV type affects disease progress
The type of HIV a person has predicts how quickly they will die from Aids, a study has suggested.
Types of HIV Infections (AIDS)
For the first few years of the AIDS epidemic, it appeared that some HIV-infected people sickened and died quickly while the others stayed healthy indefinitely or slowly progressed into sickness.
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