Mexico's confirmed flu death toll has risen to 19 on Saturday and another 454 people confirmed infected, Health Minister Jose Angel Cordova said.

The previous data put the death toll at 16 dead and 443 infected.

The minister urged citizens to remain vigilant and not to let their guard down against the virus.

Meanwhile, Yonhap reported another probable case of the A/H1N1 flu in South Korea. But the case needs further confirmation.

According to the World Health Organization and government data, the confirmed infection cases have reached 777 worldwide, mainly including 454 in Mexico and 184 in the US.

In addition, 16 countries and regions have reported laboratory confirmed cases with no deaths, including Austria (1), Hong Kong, China (1), Denmark (1), Netherlands (1), Ireland (1), France (1), Costa Rica (1), Italy (1), Switzerland (1), South Korea (1), Israel (2), New Zealand (4), Germany (6), Spain (15), Britain (15) and Canada (85).

(Xinhua News Agency May 3, 2009)