Thailand's Public Health Ministry on Thursday said it is possible more Thais, who return from foreign countries, will be infectious with the A/H1N1 flu.

The prediction was announced after the center responding to the public health crisis under the Public Health Ministry held a meeting concerning the deadly new virus on Thursday morning, said Witthaya Kaewparadai, Minister of Public Health.

Hence, a history among Thais returning from abroad, especially with having a fever, will be much more focused on by medical staff at the country's international airports and borders, said Witthaya.

Also, the meeting resolved to increase a number of medical staff at the disease control department of Bangkok's Suvarnabhumi International Airport to almost 100 from the current 60 persons a day, said Witthaya.

Meanwhile, the World Health Organization announced its adjusted world rank for Thailand as the country with having had the confirmed A/H1N1 flu patients, from the previous 31st to 33rd, said Public Health deputy permanent secretary Dr. Paijit Warachit.

Thailand's Public Health Ministry on May 12 announced the country had first two A/H1N1 flu cases, however, the two patients have already recovered and will not spread the deadly flu disease to others. The two persons had just returned from Mexico.