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World Polio vaccine in the crossfire of misinformation

05:06  19 september  2020
05:06  19 september  2020 Source:   msn.com

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As scientists around the world rush to find a vaccine to stem the spread of Covid-19, another deadly disease, polio, has become the latest target of misinformation campaigns online.

Vaccine-derived polio occurs in rare instances © PIUS UTOMI EKPEI Vaccine-derived polio occurs in rare instances

The World Health Organization (WHO) celebrated the announcement on August 25 that Africa had eradicated the wild poliovirus -- a landmark in a decades-long fight against the crippling disease.

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However, there still exists a version of the illness known as vaccine-derived polio, which occurs in rare incidents when the weakened virus in the vaccine mutates.

It particularly affects countries with low immunisation rates and poor sanitation, health experts say.

Two days after the WHO's announcement, the UN confirmed that more than a dozen cases of vaccine-derived polio had sprung up in nine states across Sudan.

The outbreak added further fuel to the already prolific spread of conspiracy theories pushing false claims about vaccination on social media.

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Conspiracy theory groups promptly reported the outbreak in articles decrying "one of the biggest public health scandals of the decade", singling out the WHO and billionaire Microsoft founder Bill Gates in their attacks.

A misleading article blaming a "Gates-funded vaccine" for "causing" the outbreak has been shared more than 8,000 times in Facebook groups from the US and Canada to Colombia.

The claims have also been circulating in Europe, with a French version of the article shared in various groups in France and Belgium.

But the article fails to mention that the cases involved people who had not been immunised themselves.

Gates, whose eponymous foundation has ploughed billions of dollars into making vaccines against diseases like polio, malaria and HIV, is a regular target for fringe groups accusing him of benefiting from vaccination or even using them for harm.

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In spring, Facebook posts shared tens of thousands of times falsely claimed that a polio vaccine tested by the Bill and Melinda Gates Foundation paralysed 490,000 children in India.

And last month, a viral YouTube video claimed the philanthropist wanted to forcefully vaccinate and "depopulate" Africa.

Gates, who has pledged $250 million in efforts to fight the Covid-19 crisis, has pushed back against rumours, blaming "a bad combination of pandemic and social media and people looking for a very simple explanation".

- Lack of immunisation -

According to the WHO, 1,271 people around the world have caught vaccine-derived polio in the past decade.

The disease typically spreads when the weakened vaccine-virus is excreted by a vaccinated person and then picked up by others through contaminated water or food.

Oliver Rosenbauer, spokesman for the WHO's polio eradication scheme, told AFP Fact Check that while contamination could in fact "passively immunise other kids", it can have devastating consequences in countries with low immunisation rates.

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"The problem arises when you have a community which is very poorly vaccinated, because this virus is allowed to continue to spread, to find susceptible unvaccinated children," he said.

"Over time, it can actually revert to a strain that is a strong strain, no longer a weak strain."

According to the WHO, people are protected against both vaccine-derived and wild polioviruses if a population is "fully immunised".

The UN's health agency has warned of a surge in vaccine-derived polio cases in recent years. More than 360 cases were recorded in 2019, compared to 104 in 2018 and 96 in 2017.

Sixteen countries across the continent are currently experiencing outbreaks, with the novel coronavirus forcing some vaccination campaigns to a halt.

But a new vaccine that "cannot genetically mutate" is on the cards, said Richard Mihigo, the WHO's programme area manager for immunisation and vaccine development in Africa.

This novel oral polio vaccine (nOPV), which is "more genetically stable" and "cannot genetically mutate", is set to be introduced from the end of the month, he said.

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