HONG KONG -- Hong Kong authorities activated a newly created “serious response" level as fears spread about a mysterious infectious disease that may have been brought back by visitors to a mainland Chinese city.
Eight possible cases have been reported of a viral pneumonia that has also infected at least 44 people in Wuhan, an inland city west of Shanghai, about 900 kilometers (570 miles) north of Hong Kong.
The outbreak, which emerged last month, has revived memories of the 2002-2003 SARS epidemic that started in southern China and killed more than 700 people in the mainland, Hong Kong and elsewhere.
The serious response level indicates a moderate impact on Hong Kong's population of 7.5 million people. It is the second highest in a three-tier system that is part of a new government plan launched Saturday to respond to infectious diseases of unknown cause.
The most common symptom has been fever, with shortness of breath and lung infections in a small number of cases, the commission said, There have been no clear indications of human-to-human transmission of the disease.
The latest cases in Hong Kong are two women and one man, aged between 4 and 50 years old, who had been to Wuhan in the past 14 days and had fever and respiratory infection or pneumonia symptoms, the Hospital Authority said. They were in stable condition and being treated at hospitals in isolation.
Besides SARS, or severe acute respiratory syndrome, Hong Kong also was hit by bird flu in 1997 and swine flu in 2009.