The two new vaccines have been sent to Gangcha County -- where migratory birds killed by the deadly H5N1 virus were found on May 4 -- in a bid to prevent the deadly avian disease from further spreading.

They also said they are willing to provide technical support in epidemic prevention to other countries and regions and contribute to the breeding industry and public health security worldwide.

Chen Hualan, director of the China National Bird Flu Reference Laboratory, based in Harbin, capital of Heilongjiang Province, said the two new vaccines developed by her lab had proved to be a success, having passed a state-level appraisal plus a permit granted by the Chinese Ministry of Agriculture for sale on the market.

"Experiments show the efficiency rate of the newly developed vaccines in preventing infection by the H5N1 virus is 100 percent," said Chen.

In the meantime, China has developed three new technologies with which it takes less than 10 hours to confirm a bird flu epidemic, compared to 72 hours in the past, with more time being gained for prevention measures or for taking action.

Dr. Bernard Vallat, Director General of World Organization for Animal Health (OIE), said China leads the world in research on bird flu and relevant technologies for prevention.

More of the two new vaccines have been sent to Gangcha County, where dead migratory birds, confirmed by Chen's lab to be caused by the deadly H5N1 virus, were found on 4 May, in a bid to prevent the deadly avian disease from further spreading.

There were no reports in the world of vaccines being tested on water birds before China began its research. The latest experimental results show that the newly developed vaccines of Chen's lab are equally effective in water fowl, and ducks and geese, which when inoculated with the vaccines did not develop bird flu symptoms.

"With the vaccines, one activated and the other inactivated, the important way for spreading of bird flu virus can be cut off," said Chen.

Compared with conventional ones, the inactivated bird flu vaccine can provide stronger protection against infection in water birds such as ducks and geese upon inoculation, while the term of effectiveness on chickens will be prolonged by four months. The bird flu activated vaccine can produce a protection shield against assault of the H5N1 virus in fowls within nine months after inoculation.

"Both the activated and inactivated vaccines are safe for food security, as the meat of fowls being inoculated with the vaccines have been shown not to be affected," said Chen.