News / Health

Revolutionary Vaccine Breaks Refrigeration Barrier in Africa

FILE - A Somali baby cries while receiving a five-in-one vaccine against several potentially fatal childhood diseases, at the Medina Maternal Child Health center in Mogadishu, Somalia
FILE - A Somali baby cries while receiving a five-in-one vaccine against several potentially fatal childhood diseases, at the Medina Maternal Child Health center in Mogadishu, Somalia
Jennifer Lazuta
For decades, distribution of vaccines in Africa and other warm regions has been hampered by the need to keep the vaccines refrigerated - a major challenge in remote areas without electric power.  But the World Health Organization says a new vaccine aimed at preventing meningitis A can withstand temperatures up to 40 degrees Celsius, and was found to be 100 percent effective during a trial study in Benin. 

Researchers said that health workers in Benin have successfully immunized more than 155,000 people against meningitis A using the first vaccination to be approved for use without constant refrigeration, also known as the "cold chain."

The World Health Organization (WHO) said the vaccine, which is known as MenAfriVac, can be stored for up to four days in temperatures up to 40 degrees Celsius.

PATH is a U.S.-based non-profit organization that partnered with the WHO on the Meningitis Vaccine Project.  Dr. Marie-Pierre Preziosi, the project's director, said the new breakthrough could revolutionize the way vaccination campaigns are conducted in developing countries.  She spoke to VOA from Ouagadougou.

“As you know, vaccines are usually kept in cold chains, between 2 to 8 degrees Celsius.  And so you have to have the whole capacity around the cold chain: that is freezers, ice packs, transportation fuel, electricity fuel, all of this.  Sometimes, it is not only costly, but it is also very challenging to reach remote areas with such constraints,” said Preziosi.

Health experts said that because of the cold chain requirement, there is normally a lot of wasted vaccine vials during immunization campaigns, particularly during the “last mile” -- the time from when the vaccine leaves the refrigerator at the district health center until it is injected into a person’s arm at the village level.

Many communities in Africa have no access to electricity and are often too remote to be reached before the ice packs in insulated coolers melt.

Preziosi said the flexibility of being able to transport the vaccine outside of the cold chain meant that only nine vaccine vials out of 15,000 had to be discarded during the trial study in Benin.

Being able to work outside the cold chain also meant that health workers didn’t have to travel to and from the district health center each day to replenish vaccine supplies.  This allowed them to vaccinate more people in a shorter amount of time.

PATH’s vice president for product development, Dr. David Kaslow, said that removing the refrigeration requirement for MenAfriVac could also reduce costs.

“The one study that was done with the WHO looked at the modeled scenario, which is: what are all the costs that are incurred in that last mile?  And really, one of the major costs, obviously, are the cold chain costs themselves… And so the analysis was done as to what is the cost savings.  And it’s about 50 percent," he noted. "On average, from 24 cents per dose delivered to 12 cents per dose delivered.”

Meningitis, which is the inflammation of the protective tissue that covers the brain and spinal cord, can lead to severe brain damage if left untreated and results in death in about 50 percent of cases.

The WHO said that while meningitis can be prevented with vaccines, more than one million suspected cases have been reported by countries in Africa’s "meningitis belt" over the past 20 years.

The Meningitis Vaccine Project said that following the MenAfriVac vaccination campaign in Benin, there were no reported cases of Meningitis A in any of the 150 vaccinated communities.

Kaslow said that it is now up to individual countries to take advantage of this success and allow health workers to use MenAfriVac within the new temperature conditions.

He said the next step will be for pharmaceutical developers to see if the refrigeration requirements for other vaccines, such as cholera, can also be changed.

You May Like

Australia-Cambodia Resettlement Agreement Raises Concerns

Agreement calls for Cambodia to accept refugees in return for $35 million in aid and reflects Australia’s harder line approach towards asylum seekers and refugees More

India Looks to Become Arms Supplier Instead of Buyer

US hopes India can become alternative to China for countries looking to buy weapons, but experts question growth potential of Indian arms industry More

Earth Day Concert, Rally Draws Thousands in Washington

President Obama also took up the issue Saturday in his weekly address, saying there 'no greater threat to our planet than climate change' More

This forum has been closed.
Comments
     
There are no comments in this forum. Be first and add one

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Are Energy Needs Putting Thailand's Natural Beauty at Risk?i
X
Steve Sandford
April 17, 2015 12:50 AM
Thailand's appetite for more electricity has led to the construction of new dams along the Mekong River to the north and new coal plants near the country's famous beaches in the south. A proposed coal plant in a so-called "green zone" has touched off a debate. VOA's Steve Sandford reports.
Video

Video Are Energy Needs Putting Thailand's Natural Beauty at Risk?

Thailand's appetite for more electricity has led to the construction of new dams along the Mekong River to the north and new coal plants near the country's famous beaches in the south. A proposed coal plant in a so-called "green zone" has touched off a debate. VOA's Steve Sandford reports.
Video

Video Overwhelmed by Migrants, Italy Mulls Military Action to Stabilize Libya

Thousands more migrants have arrived on the southern shores of Italy from North Africa in the past two days. Authorities say they expect the total number of arrivals this year to far exceed previous levels, and the government has said military action in Libya might be necessary to stem the flow. VOA's Henry Ridgwell reports.
Video

Video Putin Accuses Kyiv of ‘Cutting Off’ Eastern Ukraine

Russian President Vladimir Putin, in his annual televised call-in program, again denied there were any Russian troops fighting in Ukraine. He also said the West was trying to ‘contain’ Russia with sanctions. Henry Ridgwell reports on reactions to the president’s four-hour TV appearance.
Video

Video Eye Contact Secures Dog's Place in Human Heart

Dogs serve in the military, work with police and assist the disabled, and have been by our side for thousands of years serving as companions and loyal friends. We love them. They love us in return. VOA’s Rosanne Skirble reports on a new study that looks at the bio-chemical bond that cements that human-canine connection.
Video

Video Ukrainian Volunteers Search for Bodies of Missing Soldiers

As the cease-fire becomes more fragile in eastern Ukraine, a team of volunteer body collectors travels to the small village of Savur Mohyla in the what pro-Russian separatists call the Donetsk Peoples Republic - to retrieve bodies of fallen Ukrainian servicemen from rebel-held territories. Adam Bailes traveled with the team and has this report.
Video

Video Xenophobic Violence Sweeps South Africa

South Africa, long a haven for African immigrants, has been experiencing the worst xenophobic violence in years, with at least five people killed and hundreds displaced in recent weeks. From Johannesburg, VOA’s Anita Powell brings us this report.
Video

Video Sierra Leone President Koroma Bemoans Ebola Impact on Economy

In an interview with VOA's Shaka Ssali on Wednesday, President Ernest Koroma said the outbreak undermined his government’s efforts to boost and restructure the economy after years of civil war.
Video

Video Protester Lands Gyrocopter on Capitol Lawn

A 61-year-old mailman from Florida landed a small aircraft on the Capitol lawn in Washington to bring attention to campaign finance reform and what he says is government corruption. Wednesday's incident was one in a string of security breaches on U.S. government property. Zlatica Hoke reports the gyrocopter landing violated a no-fly zone.
Video

Video Apollo 13, NASA's 'Successful Failure,' Remembered

The Apollo 13 mission in 1970 was supposed to be NASA's third manned trip to the moon, but it became much more. On the flight's 45th anniversary, astronauts and flight directors gathered at Chicago's Adler Planetarium to talk about how the aborted mission changed manned spaceflight and continues to influence space exploration today. VOA’s Kane Farabaugh reports.
Video

Video Badly Burned Ukrainian Boy Bravely Fights Back

A 9-year-old Ukrainian boy has returned to his native country after intensive treatment in the United States for life-threatening burns. Volodia Bubela, burned in a house fire almost a year ago, battled back at a Boston hospital, impressing doctors with his bravery. Faith Lapidus narrates this report from VOA's Tetiana Kharchenko.
Video

Video US Maternity Leave Benefits Much Less Than Many Countries

It was almost 20 years ago that representatives of 189 countries met at a UN conference in Beijing and adopted a plan of action to achieve gender equality around the world. Now, two decades later, the University of California Los Angeles World Policy Analysis Center has issued a report examining what the Beijing Platform for Action has achieved. From Los Angeles, Elizabeth Lee has more.
Video

Video Endangered Hawaiian Birds Get Second Chance

Of the world's nearly 9,900 bird species, 13 percent are threatened with extinction, according to BirdLife International. Among them are two Hawaiian honeycreepers - tiny birds that live in the forest canopy, and, as the name implies, survive on nectar from tropical flowers. Scientists at the San Diego Zoo report they have managed to hatch half a dozen of their chicks in captivity, raising hopes that the birds will flutter back from the brink of extinction. VOA’s George Putic reports.
Video

Video Exhibit Brings Renaissance Master Out of the Shadows

The National Gallery of Art in Washington has raised the curtain on one of the most intriguing painters of the High Renaissance. Mostly ignored after his death in the early 1500s, Italian master Piero di Cosimo is now claiming his place alongside the best-known artists of the period. VOA’s Ardita Dunellari reports.
Video

Video Sidemen to Famous Blues Artists Record Their Own CD

Legendary blues singer BB King was briefly hospitalized last week and the 87-year-old “King of the Blues” may not be touring much anymore. But some of the musicians who have played with him and other blues legends have now released their own CD in an attempt to pass the torch to younger fans... and put their own talents out front as well. VOA’s Greg Flakus has followed this project over the past year and filed this report from Houston.
Video

Video Iran-Saudi Rivalry Is Stoking Conflict in Yemen

Iran has proposed a peace plan to end the conflict in Yemen, but the idea has received little support from regional rivals like Saudi Arabia. They accuse Tehran of backing the Houthi rebels, who have forced Yemen’s president to flee to Riyadh, and have taken over swaths of Yemen. As Henry Ridgwell reports for VOA, analysts say the conflict is being fueled by the Sunni-Shia rivalry between the two regional powers.

VOA Blogs