Nearly 10,000 cases of swine flu have been confirmed in 40 countries, the World Health Organization (WHO) says.
The WHO said 79 people are known to have died from the new virus.
UN Secretary General Ban Ki-Moon told the World Health Assembly that "global solidarity" was needed, particularly regarding distributing any vaccine.
Some medical charities have suggested that the large vaccine orders already placed by wealthy countries will mean there will not be enough for everyone.
The WHO says the global tally of swine flu cases stands at 9,830, after rising by 1,001 in one day.