Vaccination is 90 per cent effective at preventing deaths from the Delta variant of Covid-19, according to research by the University of Edinburgh.
The new study - gathered using a Scotland-wide Covid surveillance tool - provided hugely positive results.
Figures show that the Pfizer-BioNTech vaccine is 90% effective with the Oxford-AstraZeneca jab showing 91% effectiveness in prevents deaths in those double jabbed.
The research considered the impact coronavirus had on those who tested positive for the virus after receiving both vaccine doses.
The study is the first of its kind, looking at results across an entire country to examine the effectiveness of the vaccines.
The research specifically examined whether the vaccines prevented death from the Delta variant - which is currently the most dominant for of Covid throughout the UK.
Analysing date from 5.4 million people across Scotland, the researched defined death from Covid as anyone who had died within 28 days of a positive PCR test, or with Covid recorded as cause of death on their death certificate.
The study was conducted between April 1 and September 27 this year.
During this period, 115,0000 people returned a positive PCR test in the community and there were a total of 201 Covid-related deaths recorded.
The numbers did not include positive tests recorded in Scotland's hospitals.
No deaths have been recorded in those who have been double vaccinated with the Modern vaccine in Scotland, according to the data.
Researchers said it is therefore not possible to estimate this particular vaccine's effectiveness in preventing Covid-related deaths.
The research team from the University of Edinburgh, University of Strathclyde and Public Health Scotland analysed the dataset as part of the "EAVE II project" - Early Pandemic Evaluation and Enhanced Surveillance of Covid-19 - which uses anonymised linked patient data to track the pandemic and the vaccine rollout in real time.
Professor Aziz Sheikh, director of the University of Edinburgh's Usher Institute and EAVE II study lead, said: "With the Delta variant now the dominant strain in many places worldwide and posing a higher risk of hospitalisation than previous variants seen in the UK, it is reassuring to see that vaccination offers such high protection from death very shortly after the second dose.
"If you still have not taken up your offer to be vaccinated, I would encourage you to do so based on the clear benefits it offers."
Professor Chris Robertson, of the University of Strathclyde and Public Health Scotland, said: "This study shows the value of carrying out analyses of routine healthcare data available in near real-time.
"Our findings are encouraging in showing that the vaccine remains an effective measure in protecting both ourselves and others from death from the most dominant variant of Covid-19. "
To increase confidence in these early findings, researches said data gathering needs to be repeated in other countries and settings, and with longer follow-up time after full vaccination.
Professor Robertson added: "It is very important to validate these early results in other settings and with a longer follow-up study."
The team behind the study said due to the observational nature of the figures, data about vaccine effectiveness should be interpreted with caution and it is not possible to make a direct comparison between both vaccines.
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