Five countries reported their first confirmed cases of swine influenza A-H1N1 on Friday and Saturday. 

The countries are Venezuela, Hungary, Estonia, Bolivia, and Lebanon.

The five are in addition to the 53 countries listed by the World Health Organization in its latest statement on the disease on Friday.  The U.N. agency reported more than 15,500 cases of swine flu worldwide.

Mexico has the most deaths, with 97, followed by the United States with 11 fatalities.  However, Mexico had the second-highest number of infections - nearly 5,000 - behind the United States, with nearly 8,000 cases.

Authorities in Venezuela said a 22-year-old man contracted swine flu during a trip to Panama. 

Health officials in Budapest said a Brazilian man fell ill three days after arriving in Hungary from New York, but he has since recovered. 

Estonia said the A-H1N1 virus has been confirmed in a 29-year-old man who also had recently returned from the United States.

Meanwhile, China reported its first suspected case of the swine flu in a person who is believed to have contracted the disease within China.

Cuba announced it is lifting a month-long suspension on flights to Mexico, since the swine-flu threat has eased.  Direct flights between Cuba and Mexico will resume on June 1.

The Cuban government has reported four confirmed cases of swine flu - three medical students who had recently returned to Cuba from their homes in Mexico, and a Canadian infant whose parents took him to Cuba on a trip from Toronto.

Some information for this report was provided by AFP, AP and Reuters.