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New Ebola vaccine may be up to 100% effective: WHO

The World Health Organization (WHO) has expressed confidence that a prototype vaccine for Ebola called rVSV-ZEBOV may be 100% effective in protecting against the deadly virus.

The vaccine was initially developed in Canada by public health authorities before being taken over by pharmaceutical giant Merck.

Key Facts
  • Earlier in a major experimental human clinical trial of this vaccine conducted on nearly 6,000 people in Guinea in 2015 was found to successfully.
  • It was observed that no one from the 6,000 people contracted again to the lethal disease. The test results of the trial were released in The Lancet magazine.
  • This new vaccine has not yet been approved by any regulatory authority. But it is said that the vaccine could become available in 2018 under a fast-track approval process.
  • However, this new vaccine has some flaws as it appears to work against only one of the two most common strains of the Ebola virus.
  • Thus, it may not give long-lasting protection and some of patients who were given this vaccine have reported side effects like joint pain and headaches.

About Ebola virus

Ebola virus disease (EVD) is a severe, often fatal illness in humans. It was first identified in 1976 in the Democratic Republic of Congo in a village near the Ebola River, from which it takes its name. It is transmitted to people from wild animals and spreads in the human population through human-to-human transmission. Fruit bats are natural host of this virus. It spreads through contact with body fluids of inflected persons such as blood, urine and saliva. Symptoms faced by people who have contracted the Ebola virus include high fever, bleeding and central nervous system damage. In 2014, Ebola virus had erupted periodically mainly across west and east Africa mainly in Guinea, Liberia and Sierra Leone. It was the deadly outbreak of the virus in the history that had killed 11,000 people.

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Ebola outbreak in West Africa no longer poses global risk: WHO

The World Health Organisation (WHO) has declared that Ebola outbreak in West Africa is no longer constitutes a Public Health Emergency of International Concern.

WHO, a specialized agency of the United Nations has officially declared an end to a nearly 20-month Ebola outbreak emergency that has killed about 11,300 people.

The declaration was made by WHO Director-General Dr Margaret Chan after accepting the recommendations of a committee of independent experts.

The committee also has called for the lifting of any travel and trade restrictions affecting Guinea, Liberia and Sierra Leone.

Ebola outbreak

Guinea was birthplace of deadliest Ebola outbreak in history and was initially centred on country’s remote south-eastern region of Nzerekore in 2013. Later it had spread to its neighbouring countries Liberia and Sierra Leone and also seven other countries. So far has killed more than 11,300 people in these three worst hit western African nations.

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WHO declares end of Ebola outbreak in West Africa

The World Health Organization (WHO) has declared the end of  Ebola virus outbreak in West Africa after all known chains of transmission have been stopped.

WHO’s announcement came with declaration of end disease in Liberia after no positive case was reported in last 42 days (two 21-day incubation cycles of the virus).

Liberia was worst hit in Western Africa by this deadly outbreak which has killed around 4809 people. It also had completely shattered its economy, health and education sectors.

Earlier Sierra Leone was declared free from Ebola transmission in November 2015 and followed by Guinea in December 2015. Liberia was first declared free of Ebola transmission in May 2015 but the virus had reappeared twice since then.

Ebola outbreak

  • Guinea was birthplace of deadliest Ebola outbreak in history and was initially centred on country’s remote south-eastern region of Nzerekore in 2013.
  • Later it had spread to its neighbouring countries Liberia and Sierra Leone and also seven other countries.
  • After it began in 2013 it has killed more than 11,300 people in these three worst hit western African nations.

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