Singapore has confirmed its 12th case of Influenza A/ H1N1, the country's Health Ministry said on Thursday.

The patient is an 18-year-old Singaporean man. He went to Melbourne on May 16 and returned to Singapore on Emirates EK405 on Monday.

The patient went to local hospital on Thursday noon and laboratory results confirmed his infection in the evening.

The Health Ministry said the contact tracing is ongoing for the12th confirmed case. The ministry also advised the public to avoid on-essential travel to affected areas, including Melbourne and Victoria in Australia, Kobe and Osaka in Japan, Chile, the United States, Canada and Mexico.

(Xinhua News Agency June 5, 2009)