Swine flu virus ‘stable’ for now: WHO chief

Chan,however,underlined the importance of close monitoring of the spread of the virus,adding that it was highly “unpredictable.”

Since it emerged at the end of April,experts have feared that it could mutate into a virus that combines the contagious nature of swine flu with the virulence of avian flu.

The WHO declared a global pandemic earlier this month. In a global update on Thursday,it reported 55,867 laboratory-confirmed cases of the A(H1N1) virus in 109 countries and 238 human deaths from the disease since late March.