MOSCOW, May 12 (RIA Novosti) - Thailand and Cuba have joined the list of 30 countries that have reported cases of human A/H1N1 infection, local media said on Tuesday.

The A/H1N1 swine flu infection has been confirmed in a Thai patient, who has already recovered and discharged from hospital, the Bangkok Post newspaper said citing Deputy Prime Minister Sanan Kachornprasart, who heads the swine-flu prevention task force. The official did not give any further details.

Cuba's Juventud Rebelde online newspaper said a Mexican medical student, who had returned to the island after a visit home, has tested positive for the swine flu virus.

The World Health Organization has reported 4,694 confirmed swine flu cases worldwide as of Monday. Of the 53 deaths, 48 occurred in Mexico, three in the U.S., one in Canada and one in Costa Rica.

At least one A/H1N1 human infection has been confirmed in Argentina, Australia, Austria, Brazil, China, Colombia, Denmark, El Salvador, France, Germany, Guatemala, Ireland, Israel, Italy, Japan, the Netherlands, New Zealand, Norway, Panama, Poland, Portugal, South Korea, Spain, Sweden, Switzerland and the U.K.

Despite the dramatic media reports that accompanied the recent outbreak of swine flu, leading scientists say the virus is a mild strain and only a further mutation could make it a serious threat. Swine flu deaths in Mexico, the worst hit by the virus, are around average for seasonal flu fatalities.

The spread of the swine flu outbreak. Infographics