In January, the FDA approved Isentress for use in children older than two years for HIV therapy.

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More so than with any other condition, taking HIV medicine as prescribed is crucial for therapy to continue to be effective.

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Dr Gordon said HIV therapy had to be personalised for individual patients, but said that trizivir would be suitable for a lot of patients.

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Almost all HIV treatment these days involves therapy cocktails tailored for each individual patient.

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Usually, these infants would get antiviral drugs at preventative doses for six weeks to prevent infection, then start therapy if HIV is diagnosed.

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Usually, these infants would get anti-viral drugs at preventative doses for six weeks to prevent infection, then start therapy if HIV is diagnosed.

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Mr Hickson says the therapy would be particularly important for people in relationships where they knew one partner was HIV positive, in case of condom failures, for example.

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