WHO says herd immunity requires effective vaccine

By: |
August 18, 2020 6:13 PM

WHO's emergencies chief Dr. Michael Ryan largely dismissed that theory at a press briefing on Tuesday, saying we should not live in hope of achieving herd immunity.

But some experts have suggested that even if half the population had immunity, there might be a protective effect.But some experts have suggested that even if half the population had immunity, there might be a protective effect.

The World Health Organization says the planet is nowhere near the amount of coronavirus immunity needed to induce herd immunity, where enough of the population would have antibodies to stop the spread.

Herd immunity is typically achieved with vaccination and most scientists estimate at least 70 per cent of the population must have antibodies to prevent an outbreak. But some experts have suggested that even if half the population had immunity, there might be a protective effect.

WHO’s emergencies chief Dr. Michael Ryan largely dismissed that theory at a press briefing on Tuesday, saying we should not live in hope of achieving herd immunity.

As a global population, we are nowhere close to the levels of immunity required to stop this disease transmitting, he said. This is not a solution and not a solution we should be looking to. Most studies conducted to date have suggested only about 10 per cent to 20 per cent of people have antibodies.

Dr. Bruce Aylward, a senior adviser to WHO’s director-general, added that any mass immunisation campaign with a COVID-19 vaccine would aim to cover far more than 50 per cent of the world’s population.

We don’t want to be wrong, he said. You want to plan to get high coverage and not get lulled into a dangerously seductive suggestion that (the herd immunity threshold) could be low.

Get live Stock Prices from BSE, NSE, US Market and latest NAV, portfolio of Mutual Funds, calculate your tax by Income Tax Calculator, know market’s Top Gainers, Top Losers & Best Equity Funds. Like us on Facebook and follow us on Twitter.

Financial Express is now on Telegram. Click here to join our channel and stay updated with the latest Biz news and updates.

Next Stories
1How many health workers were infected or died during COVID duty? No data maintained by Central govt
2Bars in Andhra Pradesh to be re-opened from September 19
3Coronavirus vaccine: EU seals second coronavirus vaccine deal