The Centre for Health Protection has learned of five avian influenza A (H7N9) cases on the Mainland, involving five men.
The patients, one from Fujian and the others from Jiangsu, are aged 32 to 64.
Mainland health authorities have reported 783 human H7N9 cases since 2013.
The centre reminded travellers to the Mainland and other avian influenza-affected areas not to visit live poultry markets and farms, and to avoid contact with poultry and their droppings, particularly when travelling during the Christmas and New Year holidays.
