Another worker at Hong Kong airport was on Saturday found to have been infected with measles, bringing the number of cases in the city this year to 55.The 25-year-old customer service officer contracted the disease despite a previous vaccination and past good health. He developed a fever on Tuesday followed by a rash two days later.The city’s Centre for Health Protection said the man worked on the seventh floor of Terminal 1, and had consulted a general practitioner on Friday before attending…