Swine flu in Africa

Health experts are warning that it will be difficult to track the swine flu virus as it spreads across Africa.

The number of cases is rising in many countries and there are fears that the threat posed by the disease is being underestimated.

The H1N1 influenza virus was first detected in Mexico and has now spread to almost all corners of the globe.

The African country worst hit by swine flu so far is South Africa, where six people have died.

On the line to Johannesburg, Sophie Ikenye spoke to Dr. Adian Puren - Head of Virology - at the National Institute of Communicable Diseases in South Africa.