23 December 2016

West Africa: Prototype Vaccine for Ebola Virus Proves Effective in Guinea

Photo: MINUAUCE / Martine Perret
Countries affected by the Ebola outbreak initiated hand-sanitising campaigns. (file photo)

A prototype vaccine for Ebola has proven effective in Guinea, according to the World Health Organization. It hopes fast-track approval will emerge by 2018. The hemorrhagic virus killed 11,300 people in western Africa.

WHO assistant director-general Marie-Paule Kieny wrote in the medical journal "The Lancet" that an "effective vaccine" for Ebola, dubbed rVSV-ZEBOV should be 80 percent effective in a fully-fledged epidemic.

The Canadian-developed vaccine was given to nearly 6,000 people in Guinea's coastal region of Gasse-Guinée in a "phase 3" clinical trial last year.

It was carried out last year at the tail end of western Africa's epidemic that began in early 2014 and also spanned Liberia and Sierra Leone, prompting world alarm.

Not one person contracted the disease, but among a control group of unvaccinated volunteers 23 cases did occur, wrote Kieny who led a team at the WHO which took over the study.

"When the next Ebola outbreak hits, we will not be defenseless," she said, adding that the pharmaceutical giant Merck would seek fast-track approval in the USA and Europe next year.

"We may have a vaccine which is registered in 2018," Kieny told journalists in Geneva. "They will be able to produce a million in [a] very short period of time," she noted.

'Effective vaccine'

A Texas expert, who did not take part in the study, Thomas Giesbert of the Galverston National Laboratory, said the world appeared to have an effective vaccine to work on after 40 years of uncontrollable outbreaks.

Infectious disease professor John Edmunds, whose team at the London School of Hygiene & Tropical Medicine helped design the trial, spoke of a "historic" success.

Ebola was first identified in 1976 in the Democratic Republic of Congo and erupted periodically in several hundred cases, mainly across western and eastern Africa.

Clusters of contact persons vaccinated

In Basse-Guinée, researchers used a "ring vaccination" approach by tracing all people who had had contact with the patient at the center of each new Ebola case.

The rings typically comprised 80 people. Some received the prototype vaccine immediately, others after a three-week delay.

When interim results showed 100 percent protection for those vaccinated immediately, all trial participants were given shots straight away.

Among the 5,800 people vaccinated, 80 suffered side effects, which had all been successfully remedied.

Russian 'vaccine' not proven

The global vaccine alliance GAVI contributed $5 million (4.7 million euros) earlier this year to buy 300,000 doses of rVSV-EBOV as a preliminary stockpile.

Kieny told the German Protestant church news agency EPD that a substance declared to have been a vaccine by Russian President Vladimir Putin in January had proven to have no protective effect.

ipj/jm (AFP, Reuters, epd)

West Africa

Foodstuff, Cattle Dealers to Resist Illegal Multiple Taxation On Roads

The Amalgamated Union of Foodstuff and Cattle Dealers of Nigeria (AUFCDN) Rivers branch, says it is determined to resist… Read more »

Copyright © 2016 Deutsche Welle. All rights reserved. Distributed by AllAfrica Global Media (allAfrica.com). To contact the copyright holder directly for corrections — or for permission to republish or make other authorized use of this material, click here.

AllAfrica publishes around 800 reports a day from more than 140 news organizations and over 500 other institutions and individuals, representing a diversity of positions on every topic. We publish news and views ranging from vigorous opponents of governments to government publications and spokespersons. Publishers named above each report are responsible for their own content, which AllAfrica does not have the legal right to edit or correct.

Articles and commentaries that identify allAfrica.com as the publisher are produced or commissioned by AllAfrica. To address comments or complaints, please Contact us.