(Updates U.S. cases)

May 29, (Reuters) - At least 15,600 people have been officially confirmed infected with the new H1N1 flu strain in 53 countries (with Taiwan and Hong Kong included in China).

Romania, Singapore and Slovakia identified their first cases of the new H1N1 flu virus this week.

Here are some details about the spread of the virus:

DEATH TOLL: 113

CONFIRMED CASES: The number of confirmed cases of H1N1 is 15,608 in 53 countries.

COUNTRIES MOST AFFECTED:

DEATHS CASES

MEXICO 95 4,974*

UNITED STATES 15 8,975***

CANADA 2 1,118

COSTA RICA 1 33

JAPAN 0 364

BRITAIN 0 203

CHILE 0 199**

AUSTRALIA 0 147

SPAIN 0 143

PANAMA 0 107

NOTE: * = Mexico Ministry of Health figures

** = Chilean Health authorities.

***= U.S. authorities estimate more than 100,000 cases; confirmed cases are only a sampling

Sources: Reuters/WHO. WHO figures sometimes lag local confirmations covered by Reuters. (Writing by David Cutler, London Editorial Reference Unit;)

AlertNet news is provided by