Swine flu is continuing to spread across the world, according to latest World Health Organisation figures.
There have been 11,168 officially reported cases of influenza A (H1N1) infections, including 86 deaths, according to the WHO.
A consultation document published by the WHO highlighted the uncertainties surrounding the outbreak – how fast it will spread, whether it will become widely established and how the virus’s infectivity and virulence will change over time.
The document, based on a consultation with experts from across the world, states: ‘There is concern that the spread of the virus to the southern hemisphere could have different and perhaps more severe effects than seen in the northern hemisphere, particularly since the populations in the southern hemisphere are generally more vulnerable. These groups are younger and often live in crowded urban settings.’