Some strains of bird flu are coming ever closer to developing the traits they need to cause a human pandemic, a study released yesterday said. Researchers who analyzed samples of recent avian flu viruses found that a few H7 strains of the virus that have caused minor, untransmissible infections in people in North America between 2002 and 2004 have increased their affinity for the sugars found on human tracheal cells.
Subsequent tests in ferrets suggested that these viral strains were not readily transmissible. But one strain of the H7N2 virus, a low pathogenic avian flu strain isolated from a man in New York in 2003, replicated in the ferret’s respiratory tract and was passed between infected and uninfected ferrets suggesting it could be transmissible in humans.
The investigators said the evidence suggests that the virus could be evolving toward the same strong sugar-binding properties of the three worldwide viral pandemics in 1918, 1957 and 1968.
“These findings suggest that the H7 class of viruses are partially adapted to recognize the receptors that are preferred by the human influenza virus,” said Terrence Tumpey, a senior microbiologist with the US Centers for Disease Control and Prevention in Atlanta, Georgia.
The authors said that if the viruses continue to evolve in this direction, the avian flu viruses could travel more easily between other animals and humans.
They called for strict surveillance of avian flu viruses and continuing federal preparations for a possible future pandemic.
The study appears in the Proceedings of the National Academy of Sciences.
AIR DEFENSE: The Norwegian missile system has proved highly effective in Ukraine in its war against Russia, and the US has recommended it for Taiwan, an expert said The Norwegian Advanced Surface-to-Air Missile Systems (NASAMS) Taiwan ordered from the US would be installed in strategically important positions in Taipei and New Taipei City to guard the region, the Ministry of National Defense said in statement yesterday. The air defense system would be deployed in Taipei’s Songshan District (松山) and New Taipei City’s Tamsui District (淡水), the ministry said, adding that the systems could be delivered as soon as the end of this year. The US Defense Security Cooperation Agency has previously said that three NASAMS would be sold to Taiwan. The weapons are part of the 17th US arms sale to
SERIOUS ALLEGATIONS: The suspects formed spy networks and paramilitary groups to kill government officials during a possible Chinese invasion, prosecutors said Prosecutors have indicted seven retired military officers, members of the Rehabilitation Alliance Party, for allegedly obtaining funds from China, and forming paramilitary groups and assassination squads in Taiwan to collaborate with Chinese troops in a possible war. The suspects contravened the National Security Act (國家安全法) by taking photos and drawing maps of key radar stations, missile installations and the American Institute in Taiwan’s headquarters in Taipei, prosecutors said. They allegedly prepared to collaborate with China during a possible invasion of Taiwan, prosecutors said. Retired military officer Chu Hung-i (屈宏義), 62, a Republic of China Army Academy graduate, went to China
INSURRECTION: The NSB said it found evidence the CCP was seeking snipers in Taiwan to target members of the military and foreign organizations in the event of an invasion The number of Chinese spies prosecuted in Taiwan has grown threefold over a four-year period, the National Security Bureau (NSB) said in a report released yesterday. In 2021 and 2022, 16 and 10 spies were prosecuted respectively, but that number grew to 64 last year, it said, adding that the Chinese Communist Party (CCP) was working with gangs in Taiwan to develop a network of armed spies. Spies in Taiwan have on behalf of the CCP used a variety of channels and methods to infiltrate all sectors of the country, and recruited Taiwanese to cooperate in developing organizations and obtaining sensitive information
BREAKTHROUGH: The US is making chips on par in yield and quality with Taiwan, despite people saying that it could not happen, the official said Taiwan Semiconductor Manufacturing Co (TSMC, 台積電) has begun producing advanced 4-nanometer (nm) chips for US customers in Arizona, US Secretary of Commerce Gina Raimondo said, a milestone in the semiconductor efforts of the administration of US President Joe Biden. In November last year, the commerce department finalized a US$6.6 billion grant to TSMC’s US unit for semiconductor production in Phoenix, Arizona. “For the first time ever in our country’s history, we are making leading edge 4-nanometer chips on American soil, American workers — on par in yield and quality with Taiwan,” Raimondo said, adding that production had begun in recent
RSS