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Over two thirds of Africans infected by COVID-19 since pandemic began – WHO

8 April 2022, 10:46 AM  |
Reuters Reuters |  @SABCNews
A Nigerian student takes a COVID-19 test at the Nnamdi Azikiwe International Airport upon arrival from Ukraine after fleeing the invasion by Russia, in Abuja, Nigeria March 4, 2022.

A Nigerian student takes a COVID-19 test at the Nnamdi Azikiwe International Airport upon arrival from Ukraine after fleeing the invasion by Russia, in Abuja, Nigeria March 4, 2022.

Image: Reuters

A Nigerian student takes a COVID-19 test at the Nnamdi Azikiwe International Airport upon arrival from Ukraine after fleeing the invasion by Russia, in Abuja, Nigeria March 4, 2022.

More than two-thirds of Africans have been infected by COVID-19 since the pandemic started, 97 times more than reported confirmed cases, according to a World Health Organisation (WHO) study published on Thursday.

The study found that by September 2021, 800 million Africans had been exposed to SARS-CoV-2, the virus that causes COVID-19, compared with 8.2 million cases reported at that time.

The WHO said that under-counting was happening everywhere, but to a lesser degree than in Africa. It said that on average globally, true infections were 16 times higher than confirmed cases.

The agency’s regional director for Africa, Dr Matshidiso Moeti, said that the continent’s high exposure to the virus and currently declining infection rates did not mean that Africa could declare victory against COVID-19.

“The risks of more lethal variants emerging which overwhelm immunity gained from past infections cannot be brushed aside,” she said in a statement, calling for increased testing.

The study consisted of synthesising 151 previous studies on seroprevalence in Africa, and the proportion of individuals with SARS-CoV-2 antibodies in their blood serum.

It found that exposure to the virus had rocketed from 3% in June 2020 to 65% in September 2021, with sharp rises after the emergence of the Beta and Delta variants.

Studies estimate that 45% of the global population had been infected by September 2021, but the WHO said comparisons were difficult as studies covered different time periods.

With routine diagnostic testing in Africa focused on travellers and people who come to hospitals with symptoms, seroprevalence studies provide data on asymptomatic cases that otherwise go undetected.

Africa has a higher proportion of asymptomatic cases than other parts of the world, with 67% of cases having no symptoms, the WHO said.

That is partly due to a smaller proportion of people with risk factors such as diabetes and hypertension, and partly due to the continent’s youthful population.

So far, Africa has fully vaccinated 209 million people, or 16% of the population, against COVID-19.

The WHO and other agencies are trying to ramp up vaccination rates, but are struggling with low take-up, partly due to a perception that vaccination is less useful because the now dominant Omicron variant is less virulent.

The WHO says vaccination for those with prior infection results in better protection than that offered by infection-induced immunity alone.

Over 80% of cases remain undetected 

Meanwhile, a WHO report from October last year stated that more than 85% of COVID-19 cases in Africa remain undetected.

According to the health body, six out of every seven coronavirus cases are not being detected in Africa.

WHO Public Health Expert provides more details in the video below: 

 

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Tags: AfricaWorld Health OrganisationCOVID-19
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