The excellent BBC interactive map showing the spread of H1N1 'swine' flu gives a real sense of how patterns of travel and migration have spread the disease to specific countries.
At the same time, the UN's top health official, World Health Organization head Margaret Chan, has said that the spread of the virus worldwide is now unstoppable.
"As we see today, with well over 100 countries reporting cases, once a fully fit pandemic virus emerges, its further international spread is unstoppable," Dr Chan said in her opening remarks.
The virus has entered more than 100 countries, infected more than 70,000 people and killed more than 300 worldwide. While Mexico has seen swine flu cases decrease, the peak of the flu season is approaching in South America - Paraguay has reported its first fatality, while in Central America El Salvador has also recorded its first swine flu death.