For herd immunity, a corona vaccination rate of up to 70 percent is necessary

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/picture alliance / Wolfram Steinberg

Geneva – According to experts from the World Health Organization (WHO), a vaccination rate of 60 to 70 percent of the population is necessary for an effective fight against the corona pandemic. There are some studies showing that this number is necessary to achieve herd immunity, said WHO’s top vaccination expert, Katherine O’Brien.

“Many people would be immune and would protect others,” said O’Brien last Friday evening in Geneva. Only at such a vaccination rate could the SARS-CoV-2 virus no longer spread well.

But the number of vaccinated people alone is not the decisive factor, as the experts observed in large measles outbreaks in some African countries last year. “It’s always about where exactly the virus is and how big the protective wall against it is in society,” says O’Brien.

There are also still many questions – for example, to what extent a vaccination against SARS-CoV-2 reduces the severity of a possible infection and how well it can prevent transmission of the virus.

“The vaccination will have a big impact, but I don’t think anyone can promise eradication of the virus until we understand much more about it,” said WHO Emergency Relief Coordinator Mike Ryan.

WHO chief Tedros Adhanom Ghebreyesus again appealed to wealthy countries to view vaccinations as a global good.

The corona pandemic can only be fought sustainably if there is enough money for a worldwide fair distribution of the vaccine and funds for the formation of medical infrastructure. © dpa / aerzteblatt.de



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https://www.aerzteblatt.de/nachrichten/118837/Fuer-Herdenimmunitaet-Coronaimpfrate-von-bis-zu-70-Prozent-noetig

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