HIV in 'cured' Mississippi girl reappears11th July 2014
The Mississippi girl born in with HIV was believed to be cured after very early treatment. However, tests last week on the four-year-old child show that she still has the the virus.
She had not received treatment for nearly two years and appeared free of HIV in March.
The news represents a setback for hopes that very early treatment of drugs may reverse permanent infection.
Dr Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, described the results as "obviously disappointing".
He also said: "We're going to take a good hard look at the study and see if it needs any modifications."
There was a huge hope that it would work and that the baby would be able to live a life free of the HIV virus.
Scientists have said that the antiretroviral drugs can maintain the virus at a low level in the blood stream, but HIV has hiding places in the gut and brain.
If treatment stops then the virus emerges from its reservoirs and begins its assault afresh.
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