Covid booster shots begin in several countries



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This month, several countries have started or will begin giving boosters to people already vaccinated against the coronavirus, with the aim of boosting immunity to the rapidly spreading Delta variant and the transition to a cooler season that is expected to bring more people together inside.

The Czech Republic announced this week that it will offer a booster, starting September 20, to anyone who has ever been vaccinated with a single or double dose. The country has highly recommended boosters for people over 60.

Similar policies were recently announced in Germany and France, which offer reminders for the elderly and those with underlying health conditions. And Israel is now offering reminders to people vaccinated as young as 12.

In the United States, the Biden administration has said it plans to offer boosters to most Americans eight months after vaccination, assuming federal regulators allow them. The FDA will hold a public meeting on the matter on September 17.

Despite the wave of recall programs in richer countries, the science of their necessity is not yet clear.

Some studies suggest that the protection offered by vaccines against infections and mild illnesses may weaken. But they are still very effective in preventing the worst consequences, including serious illness and death, and scientists have said a general recommendation for boosters is premature.

Experts generally agree, however, that a third injection is warranted for people with weakened immune systems, who may not have developed a strong immune response to the initial doses. Several countries, including the United States, are now offering additional vaccines to this vulnerable group.

On Thursday, the European Medicines Agency, the EU’s medicines regulatory body, said there was no urgent need to give booster doses of the Covid-19 vaccine to fully vaccinated people without problems with underlying health, citing a report from the European Center for Disease Prevention and Control. Additional doses should be considered for people with weakened immune systems, and as a precaution for the frail elderly, especially those living in nursing homes, the agencies added.

The agency said that at present, the urgency is to complete the vaccination of all those eligible for a normal course of vaccination. The drug regulator continues to assess data on booster injections.

UK Health Secretary Sajid Javid said on Wednesday that a third dose of the vaccine would be offered to people aged 12 and over with severely compromised immune systems “as soon as possible”.

“I am determined to ensure that we do all we can to protect people in this group and a third dose will help achieve this,” Javid said in a statement.

But the decision by some countries to give booster shots to healthy vaccinated people – when many countries have fledgling vaccination programs – has raised ethical questions.

At the beginning of August, Dr Tedros Adhanom Ghebreyesus, director general of the World Health Organization, called for a moratorium on recalls of coronavirus vaccines until the end of September, and for an “urgent reversal” of the supply worldwide in vaccines which had mainly disappeared. to richer nations, leaving low-income countries vulnerable.

WHO officials have been careful to distinguish between booster injections used to boost immunity in vaccinated populations and additional doses that may be needed by immunocompromised to develop immunity in the first place.

Dr Tedros reiterated this point on Wednesday.

“A third dose may be needed for populations most at risk where there is evidence of decreased immunity to serious illness and death, such as the very small group of immunocompromised people who have not responded sufficiently. at their initial doses or which no longer produce antibodies. , he said at a press conference. “But at this time, we don’t want to see widespread use of boosters for healthy people who are fully vaccinated.”

Emilie Anthès, Monika pronczuk and Daniel E. Slotnik contributed reports.

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