A new study found that Covid-19 vaccines prevent 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 preliminary study published on Friday found that family members of vaccinated British health workers were about 30 percent less likely to catch Covid-19 than those of unvaccinated workers.
Good news 👏 in this new pre-printed study of vaccination among healthcare professionals in Scotland: “it suggests that the vaccine helps prevent people from transmitting the virus to others – something that has been suspected, but has not been demonstrated before”. https://t.co/1Omp64YtkZ
– Prof. Devi Sridhar (@devisridhar) March 12, 2021
Although a 30 percent reduction may seem small, the study found that these family members were also at risk of catching the virus outside the home, making the figure “Underestimate the ‘true’ effect of vaccination on transmission.”
We provide the first direct evidence that vaccinating individuals who work in high-exposure environments reduces the risk for their close contacts – members of their families.
The study was carried out by researchers from several leading universities and institutions in the UK, including the London School of Hygiene and Tropical Medicine, the Imperial College NHS Trust and the MRC Institute of Genetics and Molecular Medicine at the University of Edinburgh. Elsewhere, Israeli researchers have also found that the vaccine of the American pharmaceutical company Pfizer is 94 percent effective against asymptomatic transmission of the virus, while the US Centers for Disease Control and Prevention recently loosened their guidelines for people who got the vaccine. , returning what the press termed “Limited freedoms” for this group.
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However, health officials in the United States insist that masking and social detachment exist for the long term, regardless of the effectiveness of vaccines. White House adviser Anthony Fauci said last month that facial coverage may be required by 2022, stating that “There are things, even if you are vaccinated, that you will not be able to do in society.”
The World Health Organization declared last month that “Critical questions remain about the effectiveness of vaccination in reducing transmission,” in a statement advising against introducing so-called ‘vaccine passports’ for air travel. This advice is due to be reviewed in May, and the latest findings from the UK and Israel may reinforce the case for vaccination testing as a prerequisite for international travel.
Devi Sridhar, professor of public health at the University of Edinburgh, predicted that the UK study will pave the way for “Aviation and international mobility [safely opening] with test passports and vaccine, ” but added that it would increase “Main ethical issues”.
Implications: 1. Possible work for suppression and elimination with a vaccine (such as measles), especially if immunity is durable for 1-2 years. International aviation and mobility will be opened safely with test and vaccine passports (raises important ethical issues).
– Prof. Devi Sridhar (@devisridhar) March 12, 2021
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