The National Institute of Hygiene and Epidemiology stated on January 18 that since the end of November there has been an increase in the number of A/H1N1 flu cases in some areas of Ho Chi Minh City, Hanoi, Khanh Hoa and Dong Nai provinces, though most cases have gone unreported.
The Ministry of Health has alerted local health departments to watch for signs of an epidemic and isolate areas where necessary to prevent A/H1N1 from spreading.
Dr. Nguyen Tran Hien, head of the National Institute of Hygiene and Epidemiology claimed that the disease was quick to spread in crowded areas such as schools and offices that use air-conditioning.
Though the present outbreak seems under control, people must continue to take preventive measures as the cold weather was most conducive for the flu virus to spread.
People must pay heed to any symptoms such as respiratory illness, high fever, sore throat, bellyache, vomiting and diarrhea and seek immediate medical treatment.