News / Health

Scientists Say New Bird Flu Poses Serious Threat

A child wears a mask near the closed poultry section at the Huhai agricultural market where the H7N9 bird flu was detected by authority in Shanghai, China, Apr. 9, 2013.
A child wears a mask near the closed poultry section at the Huhai agricultural market where the H7N9 bird flu was detected by authority in Shanghai, China, Apr. 9, 2013.
Reuters
A new strain of bird flu that is causing a deadly outbreak among people in China is a threat to world health and should be taken seriously, scientists said on Wednesday.
 
The H7N9 strain has killed 24 people and infected more than 125, according to the Geneva-based World Health Organization (WHO), which has described it as "one of the most lethal'' flu viruses.
 
The high mortality rate, together with relatively large numbers of cases in a short period and the possibility it might acquire the ability to transmit between people, make H7N9 a pandemic risk, experts said.
 
“The WHO considers this a serious threat,” said John McCauley, director of the WHO Collaborating Center for Influenza at Britain's National Institute for Medical Research.
 
Speaking at a briefing in London, experts in virology said initial studies suggest the virus has several worrisome characteristics, including two genetic mutations that make it more likely to eventually spread from person to person.
 
“The longer the virus is unchecked in circulation, the higher the probability that this virus will start transmitting from person to person,” Colin Butte, an expert in avian viruses at Britain's Pirbright Institute, said.
 
Of the some 125 people infected with H7N9 so far, around 20 percent have died, approximately 20 percent have recovered and the remainder are still sick. The infection can lead to severe pneumonia, blood poisoning and organ failure.
 
“”This is a very, very serious disease in those who have been infected. So if this were to become more widespread it would be an extraordinarily devastating outbreak,” Peter Openshaw, director of the center for respiratory infection at Imperial College London, told the briefing.
 
Scientists who have analyzed genetic sequence data from samples from three H7N9 victims say the strain is a so-called “triple reassortant” virus with a mixture of genes from three other flu strains found in birds in Asia.
 
Recent pandemic viruses, including the H1N1 “swine flu” of 2009/2010, have been mixtures of mammal and bird flu - hybrids that are likely to be milder because mammalian flu tends to make people less severely ill than bird flu.
 
Pure bird-flu strains, such as the new H7N9 strain and the H5N1 flu, which has killed about 371 of 622 the people it has infected since 2003, are generally more deadly for people.
 
Human cases of the H7N9 flu have been found in several new parts of China in recent days and have now been recorded in all of its provinces.
 
Last week a man in Taiwan became the first case of the flu outside mainland China, though he was infected while travelling there. The H7N9 strain was unknown in humans until it was identified in sick people in China in March.
 
Scientists say it is jumping from birds - most probably chickens - to people, and there is no evidence yet of the virus passing from person to person.
 
Jeremy Farrar, a leading expert on infectious diseases and director of Oxford University's research unit in Vietnam, said the age range of those infected so far stretched from toddlers to people in their late 80s - a range that appeared to confirm the virus is completely new to the human population.
 
“That suggests there truly is no immunity across all ages, and that as humans we have not seen this virus before,” he said. “The response has to be calm and measured, but it cannot be taken lightly,” he said.

You May Like

Video Obama to Send 3,000 Troops to Liberia in Ebola Fight

At Centers for Disease Control and Prevention, President says US will take leadership role for a global response to deadly Ebola virus that is ravaging West Africa More

Video China Muslims Work to Change Perceptions After Knife Attacks

Muslims in Kunming say that they condemn the violence, it is not a reflection of the true beliefs of their faith More

Humanitarian Aid, Equipment Blocked in Cameroon

Move is seen as a developing supply crisis in West Africa More

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
NASA Picks Boeing, SpaceX to Carry Astronauts Into Spacei
X
September 17, 2014 4:20 AM
The U.S. space agency, NASA, has chosen Boeing and SpaceX companies to build the next generation of spacecraft that will carry U.S. astronauts to the International Space Station by the year 2017. The deal with private industry enables NASA to end its dependence on Russia to send space crews into low Earth orbit and back. Zlatica Hoke has more.
Video

Video NASA Picks Boeing, SpaceX to Carry Astronauts Into Space

The U.S. space agency, NASA, has chosen Boeing and SpaceX companies to build the next generation of spacecraft that will carry U.S. astronauts to the International Space Station by the year 2017. The deal with private industry enables NASA to end its dependence on Russia to send space crews into low Earth orbit and back. Zlatica Hoke has more.
Video

Video Future of Ukrainian Former President's Estate Uncertain

More than six months after Ukraine's former President Viktor Yanukovych fled revolution to Russia, authorities have yet to gain control of his palatial estate. Protesters occupy the grounds and opened it to tourists but they are also refusing to turn it over to the state. VOA's Daniel Schearf reports from Mezhigirya, just north of Kyiv.
Video

Video China Muslims Work to Change Perceptions After Knife Attacks

China says its has sentenced three men to death and one woman to life in prison for a deadly knife attack in March that left more than 30 dead and 140 injured. Beijing says Muslim militants from China's restive western region of Xinjiang carried out the attacks. Now, more than six months after the incident, residents in the city are still coping with the aftermath. VOA's Bill Ide has more from Kunming.
Video

Video Enviropreneur Seeks to Save the Environment, Empower the Community

Lorna Rutto, a former banker, is now an ‘enviropreneur’ - turning plastic waste into furniture and fences discusses the challenges she faces in Africa with raw materials and the environment.
Video

Video West Trades Accusations Over Ransoms

As world leaders try to forge a common response to the threat posed by Islamic State militants in Iraq and Syria, there is simmering tension over differing policies on paying ransoms. In the past month, the jihadist group has beheaded two Americans and one Briton. Both countries refuse to pay ransom money. As Henry Ridgwell reports for VOA from London, there is uncertainty in the approach of some other European nations.
Video

Video Scotland Independence Bid Stokes Global Interest

The people of Scotland are preparing to vote on whether to become independent and break away from the rest of Britain, in a referendum being watched carefully in many other countries. Some see it as a risky experiment; while others hope a successful vote for independence might energize their own separatist demands. Foreign immigrants to Scotland have a front row seat for the vote. VOA’s Henry Ridgwell spoke to some of them in Edinburgh.
Video

Video Washington DC Mural Artists Help Beautify City

Like many cities, Washington has a graffiti problem. Buildings and homes, especially in low-income neighborhoods, are often targets of illegal artwork. But as we hear from VOA’s Julie Taboh, officials in the nation's capital have come up with an innovative program that uses the talents of local artists to beautify the city.
Video

Video US Muslim Leaders Condemn Islamic State

Leaders of America's Muslim community are condemning the violent extremism of the Islamic State group in Iraq and Syria. The U.S. Muslim leaders say militants are exploiting their faith in a failed effort to justify violent extremism. VOA correspondent Meredith Buel reports.
Video

Video Bedouin Woman Runs Successful Business in Palestinian City

A Bedouin woman is breaking social taboos by running a successful vacation resort in the Palestinian town of Jericho. Bedouins are a sub-group of Arabs known for their semi-nomadic lifestyle. Zlatica Hoke says the resort in the West Bank's Jordan Valley is a model of success for women in the region.


Carnage and mayhem are part of daily life in northern Nigeria, the result of a terror campaign by the Islamist group Boko Haram. Fears are growing that Nigeria’s government may not know how to counter it, and may be making things worse. More

AppleAndroid