WHO chief Chan meets Cuba's leader Fidel Castro

World Health Organization director general Margaret Chan has met former Cuban leader Fidel Castro.

Chan says the WHO has helped 121 countries, including Cuba , stockpile doses of the medicine Tamiflu to treat H1N1 flu.

The virus has killed nearly 5,000 people globally since appearing earlier this year.

She also toured Cuban medical facilities and came away impressed with the country's health system, which provides free care to all Cubans.