Case involves woman, 66, just returned from Guangdong province, while another probable patient under observation after three-country trip.

Cases involve 79-year-old woman who recently returned from Guangdong province’s Foshan, and father and son who travelled to Bangladesh.

Dr Joseph Tsang urges residents to be responsible and avoid travelling to high-risk areas as city records three more infections.

The mosquito-borne virus has crossed the Taiwan Strait from southern China, where confirmed cases top 8,000.

Case involves woman, 66, just returned from Guangdong province, while another probable patient under observation after three-country trip.

City’s five cases recorded in a week are ‘from the mainland or imported from overseas’, Eric Chan says.

Director of Health Dr Ronald Lam highlights notably shorter incubation period in mosquitoes, allowing virus to replicate quickly.