A new study has found that Covid-19 vaccines stop people from transmitting the virus to others. The study is one of several with similar findings and could pave the way for scientists to support the introduction of ‘vaccine passports’.
A pre-print study published on Friday found that relatives of vaccinated British healthcare workers were about 30 per cent less likely to catch Covid-19 than those of non-vaccinated workers.
Good news 👏 in this new pre-print that studies vaccination among health workers in Scotland: “suggests that the vaccine helps prevent people from transmitting the virus to others – something that has been suspected but has not been shown before.” https://t.co/1Omp64YtkZ
– Prof. Devi Sridhar (@devisridhar) 12 March 2021
Although a 30 percent reduction may seem small, the study showed that these family members are also at risk of catching the virus outside the home, giving the figure a “Underestimate the ‘true’ effect of vaccination on the transmission. ‘
We provide the first direct evidence that individuals working in high exposure reduce the risk of their close contact – members of their households.
The study was conducted by researchers at a number of top UK universities and institutions, including the London School of Hygiene and Tropical Medicine, the Imperial College NHS Trust and the MRC Institute of Genetics and Molecular Medicine of the University of Edinburgh. Elsewhere, Israeli researchers have also found that U.S. drugmaker Pfizer’s vaccine is 94 percent effective against asymptomatic transmission of the virus, while U.S. Centers for Disease Control and Prevention recently weakened its guidelines for people who have given up. named “Restricted freedoms” to this group.
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However, US health officials have insisted that masking and social distance are here for the long term, regardless of the effectiveness of vaccines. White House adviser Anthony Fauci said last month that face-covering may be needed until 2022, stating “There are things, even if you are vaccinated, that you will not be able to do in society.”
The World Health Organization declared this last month “There are still critical unknowns regarding the effectiveness of vaccination in reducing transmission,” in a statement discouraging the introduction of so-called ‘vaccine passports’ for air travel. This advice will be reviewed in May, and the latest findings from the UK and Israel could strengthen the argument for proof of vaccination as a prerequisite for international travel.
Devi Sridhar, a professor of public health at the University of Edinburgh, predicted that the British study would pave the way for “Aviation and international mobility [safely opening] with test and vaccine passports, ” but added that it would increase “Important Ethical Issues.”
Implications: 1. Possible to effect suppression and elimination with a vaccine (such as measles), especially if immunity lasts for 1-2 years. Aviation and mobility will manifest safely with test and vaccine passports (which raise major ethical issues).
– Prof. Devi Sridhar (@devisridhar) 12 March 2021
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