China has developed a batch of vaccines to deal with the current flu virus.

The influenza virus can mutate every year, making older vaccines practically useless. crienglish.com reported Thursday.

The new "slitting vaccine" was developed according the World Health Organization virus definitions, and can be used by people of all ages.

The first batch of the vaccine will be donated to hospitals and disease prevention departments across the country.

(CRI July 15, 2004)