He added the development was a "testament" to the success of the anti-HIV drugs.

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Crystal's nervousness is understandable - though doctors say that if HIV-positive women take anti-retroviral drugs during their pregnancy and avoid breast-feeding, the chance of their baby carrying the virus is tiny.

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Thanks to anti-AIDS drugs, Handumbo gave birth to a healthy, HIV-negative baby.

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But virtually all anti-retroviral drugs come from abroad at present and many people with HIV fear they'll be left without the life-saving medication.

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An example is the pool established by the international partnership Unitaid to provide HIV patients in developing countries with access to affordable anti-retroviral drugs.

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Dr Gazi believes there is a strong argument for the provision of anti-retroviral drugs because of the impact they would have in cutting the transmission of HIV from pregnant mothers to their unborn babies.

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In the meantime, DuPont AIDS drug Sustiva fits in with Bristol's two HIV treatments, and DuPont anti-coagulant Coumadin meshes with Bristol's existing heart drugs, even though no patent protects it.

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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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Anti-retrovirals, or ARVs, as the drugs used to treat AIDS are known, work by stopping HIV from breeding.

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There has also been a spiralling demand for anti-retorivirals - as more people receive these potentially life-saving drugs, more and more are coming forward for HIV testing.

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