Pfizer’s Covid vaccine efficacy against infection plunges to just 20% after six months – but protection against severe illness barely dips, study concludes

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  • Pfizer’s protection against catching COVID drops to just 20% within six months
  • Effectiveness against serious illness and death persists for at least 6 months
  • The study used data from Qatar, where 1 million is occupied with Pfizer

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Pfizer’s COVID jab is only 20 percent effective at preventing people from becoming infected after six months, real-world data revealed today.

According to Qatari researchers, two doses of the vaccine prevent 80 percent of people from catching the coronavirus after a month.

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The findings – based on an analysis of nearly a million people – mirror efficacy estimates pumped out by British health chiefs.

But the study showed that protection gradually declines, falling to only 22.3 percent among those who are fully vaccinated after six months.

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Still, scientists emphasize prevention of serious illness and death remains high after half a year, sitting at around the 90 percentage point.

UK ministers have launched a booster campaign amid fears of a vaccine-induced immunity decline after several months. Some 30 million over 50 and NHS workers will be eligible for a third dose six months after their second dose.

British health chiefs have insisted that protection against serious illness is strong.

But he opted to go ahead with the booster rollout in winter to keep immunity levels high in the most vulnerable.

According to Qatari researchers, two doses of the vaccine protect 80 percent of people from getting infected with the coronavirus after a month.

Qatar began its vaccine rollout plan last December using Pfizer Vaccine – giving doses three weeks apart. It then began pulling out a similar jab at Moderna in March.

The jabs were administered in the same order as in the UK, starting before working health workers, adults with underlying health conditions, and in age groups over 70.

As of September 7, at least more than 90 per cent-12 had received at least one COVID vaccine, while 80 per cent were double-pocketed.

The researchers estimated that the country in the Persian Gulf has the ‘highest mRNA vaccine coverage worldwide’.

Qatar has been battling two back-to-back waves of Covid between January and June this year, driven by alpha and beta strains.

The delta version began to circulate in March and went into effect a few months later. But despite high vaccine coverage, infection rates rose gradually from July to August.

Researchers examined data from 947,035 people in Qatar who had received at least one Pfizer vaccine, of which 907,763 were double-pocketed as of September.  They also examined 564,196 people who received at least one dose of Moderna, of whom 494,859 had both doses.

Researchers examined data from 947,035 people in Qatar who had received at least one Pfizer vaccine, of which 907,763 were double-pocketed as of September. They also examined 564,196 people who received at least one dose of Moderna, of whom 494,859 had both doses.

The team collected data on positive PCR tests to gauge the effectiveness of the vaccines.  About five percent of the population is tested every week

The team collected data on positive PCR tests to gauge the effectiveness of the vaccines. About five percent of the population is tested every week

Two weeks after receiving the first dose of Pfizer, the injection was 36.8 percent effective at preventing infection, increasing to 77.5 percent a month after the second dose, he said.  But protection from catching the virus drops for four months and then drops to an effective 20 percent five to seven months after the second time.

Two weeks after taking the first dose of Pfizer, the injection was 36.8 percent effective at preventing infection, which increased to 77.5 percent a month after the second dose, he said. But protection from catching the virus drops for four months and then drops to an effective 20 percent five to seven months after the second time.

However, the vaccine was too strong to prevent severe or fatal COVID cases.  Three weeks after the first dose, the jab was 66.1 percent effective, increasing to 96 percent or more within two months of the second dose.  and this high level of protection lasted about six months

However, the vaccine was too strong to prevent severe or fatal COVID cases. Three weeks after the first dose, the jab was 66.1 percent effective, increasing to 96 percent or more within two months after the second dose. and this high level of protection lasted about six months

UK daily Covid cases rise for the first time in a week: 9% jump sees 39,851 infections

Britain’s slowdown in Covid cases could be the end, official data suggested today as daily infections rose for the first time in a week.

Health department officials today posted 39,851 new positive tests, up 8.5 per cent over last Wednesday’s count of 36,722. This is the biggest daily toll since 6 September (41,192).

Hospitalizations also rose 1.1 per cent to 666 on Saturday, the latest date for which data is available. This was the first time in 20 days that the number of daily admissions had increased week-on-week.

But the death toll continues to fall within 28 days of a positive test, with 143 deaths recorded today. There was a 4.7 percent drop in deaths from the 150 recorded last Wednesday, the twelfth day in a row that the number of victims fell week-on-week.

This comes after separate official figures revealed today that nearly a fifth of people in Blackburn have tested positive for Covid since the pandemic began.

The Lancashire Authority has been the most affected area in the UK, recording 12 times more cases per population size than the least affected parts of the UK. Data from the Department of Health shows that about 19,000 people per 100,000 people have had the virus in Blackburn since March 2020, compared to just 1,500 in Scotland’s Orkney Islands.

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To understand how effective the Pfizer jab was in preventing infection, serious illness, and death, researchers at Weill Cornell Medicine tracked the size of the outbreak.

Some 947,035 people had received at least one Pfizer vaccine as of September 5, of which 96 percent were double-jabbed.

An additional 564,196 people had received at least one dose of Moderna, of whom 88 percent had both. But this group was not included in the study.

Some 8,203 infections were seen in people receiving a single dose of Pfizer, while 10,543 infections occurred in people with double-pockets.

By the end of August, 377 people taking a single dose of Pfizer had been hospitalised, 32 went to the ICU, and 34 had died of the virus.

Meanwhile, 106 people with double-pockets with Pfizer were hospitalized with the virus, 10 were admitted to the ICU and 15 died of the virus.

The researchers used this data to estimate Pfizer’s effectiveness.

The injection is only 36.8 percent effective at preventing infection two weeks after receiving the first dose.

This increases to 77.5 percent a month after the second dose, the team wrote in a study published in new…

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