A hospital in Thailand's northern province of Chiang Mai has quarantined a nine-year-old boy, who has a high fever after returning from Japan, while sending his sample to test for the A/H1N1 flu, Chiang Mai Public Health Director Dr. Wattana Kanchanakamol said on Friday.

The boy has been quarantined since May 13, The Nation newspaper's website reported. He traveled to Japan with his mother and brother.

All of them had fever after returning from Japan and earlier were closely watched for seven days, however his mother and brother recovered and were allowed to return home, Dr. Wattana said.

Separately, director of San Sai Hospital in San Sai district of Chiang Mai, Worawut Phowatcharakul said a woman, who has been quarantined in the hospital, is suffering higher fever.

No one, even her family members, is allowed to visit her, the doctor said, and refused to reveal her name.

Meanwhile, Dr. Wattana said his office has surveyed and found that over 100 students in Chiang Mai had traveled abroad during the recent summer break.

Hence, the health office in Chiang Mai has asked cooperation from universities and schools there to allow students returning aboard to stay at home for seven days to observe their condition before going to school, said the doctor.

Since May 12, Thailand's Public Health Ministry has had its 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 returned from Mexico.

(Xinhua News Agency May 15, 2009)