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

10 Migrants Drown, While 4,100 Rescued off Libyan Coast

All of those rescued are being ferried to Italian ports, with some arriving on Italy's southernmost island, Lampedusa, and others taken to Sicily and Calabria More

HRW: Saudi-led Airstrikes Use Banned Cluster Bombs

Human Rights Watch says photographs, video and other evidence have emerged indicating cluster munitions have been used in 'recent weeks' in airstrikes in Houthi stronghold in northern Yemen More

Hopes Fade of Finding Survivors of Nepal Earthquake

US military aircraft, heavy equipment and air traffic controllers arrive in Nepal to help manage growing piles of relief supplies clogging Kathmandu airport More

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
From Aleppo To Berlin: Band of Brothers Escapes Civil Wari
X
Henry Ridgwell
May 03, 2015 1:12 AM
Hundreds of thousands of Syrians have fled the civil war in their country and journeyed to Europe by boat across the Mediterranean. It is a terrifying ordeal with dangers at every turn. A group of Syrian brothers and their friends describe their ordeal as they try to reach Germany. VOA's Henry Ridgwell reports. ...
Video

Video From Aleppo To Berlin: Band of Brothers Escapes Civil War

Hundreds of thousands of Syrians have fled the civil war in their country and journeyed to Europe by boat across the Mediterranean. It is a terrifying ordeal with dangers at every turn. A group of Syrian brothers and their friends describe their ordeal as they try to reach Germany. VOA's Henry Ridgwell reports. ...
Video

Video Rural Nepal Suffers Brunt of Quake’s Devastation

Nepal is still coming to grips with the full extent of the devastation and misery caused by last Saturday’s magnitude 7.8 earthquake. Some of the hardest-hit communities have been cut off by landslides making it difficult to assess the precise toll. A VOA News crew has been among the first to reach a few of the smaller, remote communities. Correspondent Steve Herman reports from the Sindhupolchak district, east of Kathmandu, which suffered greatly in Nepal’s worst quake in more than 80 years.
Video

Video Black Families Use Baltimore Case to Revisit 'Police Talk'

Following Freddie Gray’s death in police custody this month, VOA interviewed black families throughout the eastern U.S. city of Baltimore about how they discuss the case. Over and over, parents pointed to a crucial talk they say every black mother or father has with their children. Victoria Macchi has more on how this conversation is passed down through generations.
Video

Video Middle East Atheist Channel Defies Taboo

In Egypt, a deeply religious country in a deeply religious region, atheism is not only taboo, it is dangerous. It is sometimes even criminal to publicly declare nonbelief. Despite the danger, one group of activists is pushing back with a new online channel that defends the right not to believe. VOA’s Heather Murdock reports.
Video

Video Nepal Quake Survivors Tell Their Stories

Against all hope, rescuers have found a few more survivors of the devastating earthquake that hit Nepal last Saturday. Mountain climbers and hikers trapped in remote places also have been airlifted to safety, and aid is finally reaching people in the areas closest to the quake's epicenter. Survivors and rescuers are now recounting their experience. Zlatica Hoke has this story.
Video

Video Lessons for Germany, Europe Remain on Anniversary of WWII's End

The 70th anniversary of the end of World War II will be marked May 8-9 in all European countries except Germany, which lost the war. How is the war viewed there, and what impact is it still having? From Berlin, VOA’s Al Pessin reports.
Video

Video 'Woman in Gold' Uses Artwork as Symbol of Cultural Identity

Simon Curtis’ legal drama, "Woman in Gold," is based on the true story of an American Jewish refugee from Austria who fights to reclaim a famous Gustav Klimt painting stolen from her family by the Nazis during World War II. It's a haunting film that speaks to the hearts of millions who have sought to reclaim their past, stripped from them 70 years ago. VOA's Penelope Poulou reports.
Video

Video Nepal Town Destroyed By Quake Counts Itself Lucky

Foreign search teams on Wednesday began reaching some of the communities outside Kathmandu that suffered worse damage than Nepal’s capital from last Saturday’s massive earthquake. VOA Correspondent Steve Herman is in Sankhu - a town of about 10,000 people - where there is relief the death toll is not higher despite widespread destruction.
Video

Video First Surgical Glue Approved for Use Inside Body

While medical adhesives are becoming more common, none had been approved for use inside the body until now. Earlier this year, the first ever biodegradable surgical glue won that approval from the U.S. Food and Drug Administration. VOA’s Rosanne Skirble reports on the innovation and its journey from academia to market.
Video

Video Somali Hotel Chain Owner Strives to Make a Difference

Many in the Somali diaspora are returning home to make a new life despite the continuing risks. Since 2011 when a military campaign against Al-Shabab militants began making progress, members of the diaspora community have come back to open hospitals, schools, hotels, restaurants and other businesses. Abdulaziz Billow in Mogadishu profiles the owner of a chain of hotels and restaurants who is helping to bring change to the once-deadly Somali capital.
Video

Video Study: One in Six Species Threatened with Extinction

Climate change is transforming the planet. Unless steps are taken to reduce global warming, scientists predict rising seas, stronger and more frequent storms, drought, fire and floods. As VOA’s Rosanne Skirble reports, a new study on species extinction underscores the need to take action to avoid the most catastrophic effects of rising temperatures.
Video

Video Taviani Brothers' 'Wondrous Boccaccio' Offers Tales of Love, Humor

The Italian duo of Paolo and Vittorio Taviani have been making movies for half a century: "The Night of the Shooting Stars," "Padre Padrone," "Good Morning, Babylon." Now in their 80s, the brothers have turned to one of the treasures of Italian culture for their latest film. VOA’s Carolyn Weaver reports.
Video

Video Child Migrants Cross Mediterranean Alone, Face Unknown Future

Among the thousands of migrants making the deadly journey by boat to Europe, there are unaccompanied girls and boys. Some have been sent by relatives to earn money; others are orphaned or fleeing war. From a shelter for young migrants in the Sicilian town of Caltagirone, VOA's Henry Ridgwell reports.
Video

Video Baltimore Riots Shed Light on City’s Troubled Past

National Guard troops took up positions Tuesday in Baltimore, Maryland, as authorities tried to restore order after rioting broke out a day earlier. It followed Monday's funeral of a 25-year-old black man who died while in police custody earlier this month. VOA's Chris Simkins reports.
Video

Video Challenges Await Aid Organizations on the Ground in Nepal

A major earthquake rocked Nepal on Saturday and killed thousands, injured thousands more and sent countless Nepalese outside to live in makeshift tent villages. The challenges to Nepal are enormous, with some reconstruction estimates at around $5 billion. Aid workers from around the world face challenges getting into Nepal, which likely makes for a difficult recovery. Arash Arabasadi has the story from Washington.

Poll: Baltimore Police Charged

Poll archive

VOA Blogs