Posted: 11:19 GMT, Jan. February 2021 | Updated: 12:27 GMT, Jan. February 2021

A single dose of the Pfizer / BioNTech coronavirus vaccine can block 75 percent of asymptomatic infections, according to a study of NHS staff

Asymptomatic screening by staff at Addenbrooke’s Hospital in Cambridge showed that the number of people who tested positive fell from 0.8 percent to 02 percent 12 days after their injection

The “very impressive” results are yet another sign that the UK gambling has paid off in delaying the second dose for faster coverage

Containing asymptomatic infections is critical to preventing outbreaks from unknowingly increasing as people who don’t feel sick are less likely to self-isolate

Numerous studies had shown that a single injection of the Pfizer shock prevented serious illness and death, but the extent to which it blocked asymptomatic spread was unclear Research also showed that the Oxford University shock accounted for more than 60 percent of asymptomatic cases stops

The study, led by Cambridge University, analyzed thousands of weekly Covid tests at the NHS Foundation Trust of Cambridge University Hospitals

in January

It was found that 26 out of 3252 swabs (08 percent) from unvaccinated workers gave a positive result, compared with four out of 1989 (0) 2 percent) in staff 12 days or more after vaccination

The study, which is yet to be peer-reviewed, also found that asymptomatic infection halved in those vaccinated less than 12 days, suggesting that in many cases, immunity onset quickly

Independent experts who responded to the form welcomed the results, saying they signaled that the UK was headed for a “much better future”

A single dose of the Pfizer / BioNTech coronavirus vaccine can stop 75 percent of the people spreading the disease, a study of NHS workers suggested

It was found that 26 out of 3252 swabs (08 percent) from unvaccinated workers gave a positive result, compared with four out of 1989 (0) 2 percent) in staff 12 days or more after vaccination

Professor Jonathan Ball, a molecular virologist at the University of Nottingham, said: “To see such a reduction in infection rates after a single dose of Pfizer vaccine is very impressive and shows that vaccination really offers a way out of current restrictions and a much better future

‘It is important to understand whether the reduced risk of infection will affect all exposure risk groups included in the study, but this is still excellent news’

The Pfizer vaccine prevented 94 percent of recipients in Israel from getting symptoms in a large peer-reviewed study of 1 in 2 million people

The experiment took place between the 20th December and 1 February – a time when the British mutant strain of Covid was widespread, which made the vaccine’s performance all the more impressive

The paper, published in the New England Journal of Medicine, marks the most recent victory for Israel, whose world’s best vaccine rollout provided Pfizer puffs to more than 50 percent of its 9 million residents – more than a third received both doses

The country ended draconian lockdown restrictions earlier this month and began reopening its economy over the weekend Concert halls, gyms, hotels and theaters all welcomed vaccination card holders

The “green passport” is valid for six months from the time of full vaccination (two doses) or for those who have recovered from Covid-19 and are immune

Up to 500 pass holders can visit outdoor cultural venues, while 300 people are allowed in theaters, museums and cinemas indoors

Restaurants and cafes continue to be limited to take-out service, and schoolchildren are only back in class in areas with low infection rates

The program is being closely monitored abroad Boris Johnson said the UK looked at the idea of ​​”Covid Status Certification” adding that “there are many concerns about exclusion, discrimination and privacy”

Dr Simon Clarke, Associate Professor of Cellular Microbiology at the University of Reading added, ‘In working-age adults, the Pfizer BioNTech vaccine has shown good efficacy in preventing asymptomatic infection from Covid-19 coronavirus

‘This is really important if we are to reduce the spread of people who don’t know they are infected

‘While very encouraging, no data has been provided to show how long the effect has lasted and continued monitoring will be required if this protection wanes’

He added that the study was based on research of NHS workers and there does not appear to have been an assessment of their pre-existing immune status, which, given the likelihood of exposure of healthcare workers at work, might have been higher than in the general population

‘Pre-exposure to the coronavirus before receiving a dose appears to elicit a stronger immune response to the vaccine

‘It is also important to note that these results cannot be automatically extended to all other vaccines’

During a two-week period between the 18th and 31 On January 1st, Cambridge researchers looked at a similar number of vaccinated and unvaccinated workers, with around 4400 PCR tests per week

A positive PCR swab would signal that even someone who has been vaccinated has fragments of the virus in their nose or throat that they could pass on

Reducing the spread of Covid is critical to achieving “herd immunity” when so many people are immune that a disease subsides

The results were then separated to identify unvaccinated personnel and personnel who had been vaccinated more than 12 days prior to the test when immunity onset

56 of 3282 (17 percent) of unvaccinated health care workers tested positive, compared with eight in 1997 (04 percent) 12 or more days after vaccination, quadrupling

Researchers released their data prior to peer review as there is an urgent need to share information related to the pandemic

Dr Mike Weekes, an infectious disease specialist for the Trust who led the study, said, ‘This is great news – the Pfizer vaccine not only offers protection against SARS-CoV-2 disease, but it also helps prevent infection Reducing the chance of the virus being passed on to others

‘This is welcome news as we start planning a roadmap out of lockdown, but we need to remember that the vaccine doesn’t provide complete protection for everyone – we still need social distancing, masks, hand hygiene and regular testing until the pandemic is much better under control ‘

Dr Nick Jones, first author of the study and an infectious disease expert at Cambridge, added: ‘This is fantastic news for both hospital staff and patients, who can be assured that the current strategy of mass vaccination protects against asymptomatic carriage of the virus in addition to symptomatic illnesses, making hospitals even safer ‘


The UK was criticized in January for postponing the second dose of both vaccines from three weeks to three months as the shocks were never tested with this dosing regimen

The policy recommendation was made by the Joint Vaccination and Immunization Committee (JCVI) as the country grappled with the highly virulent Kent variant and limited vaccine supply, the goal was to get wider coverage faster

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NHS COVID Vaccine

World News – UK – Pfizer’s single-dose Covid vaccine stops three quarters of cases

Source: https://www.dailymail.co.uk/news/article-9303273/Single-dose-Pfizers-Covid-vaccine-stops-three-quarters-people-spreading-disease.html