The Centre for Health Protection is investigating the year's 11th Legionnaires' disease case involving a 70-year-old man living in Wan Chai.

He came down with fever and cough on August 5 and was admitted to Queen Mary Hospital on August 8. He is in stable condition.

He had not travelled during the incubation period, and his home contacts do not have any symptoms.

There were 11 Legionnaires' cases reported last year with 16 in 2006. For prevention tips, click here.