90-120 cases undetected

(04-22 12:52)

The severity of the new H7N9 bird flu increases with age, the Hong Kong University Public Health Research Centre and Centre for Influenza Research.
A search by the centre suggested that 90 to 120 cases of human infection are not detected, said Gabriel Leung Cheuk-wai, head of the department of community medicine at HKU.
He urged tougher tests and inspections on food chain. http://www.thestandard.com.hk/breaking_news_detail.asp?id=35105