More than 7,000 Covid-related hospital admissions could have been prevented in the UK in the summer of 2022 if the population had received the full number of jabs recommended, according to research in The Lancet.
Some 44% of the UK population was under-vaccinated, with younger people among the most likely to skip doses.
In a first, health records for everyone over five in the UK were analysed.
The same approach could now be used to understand other diseases.
The entire population of the UK is 67 million, and all those over the age of five had their anonymised electronic health data analysed for The Lancet study.
It found that between June and September 2022, the percentage of people not fully vaccinated against Covid was:
49.8% in Northern Ireland
45.7% in England
34% in Scotland
32.8% Wales
And that was based on the number of Covid vaccine doses recommended for different groups:
one dose for five to 11-year-olds
two doses for 12 to 15-year-olds
three doses for 16 to 74-year-olds
four doses for over-75s
more than four for those vulnerable or shielding or with particular health conditions
With about 40,000 severe hospital admissions related to Covid during that summer, the research estimates that more than 7,000 - 17% - would have been avoided if everyone had taken up the offer of the vaccine and booster doses for which they were eligible.
The research used data on Covid vaccinations and tests, as well as from GPs and hospitals, to track health data for the whole population. They then looked at the relationship between the under-vaccinated and severe Covid illness.
They found that under-vaccinated people over-75 were more than twice as likely to be seriously ill with Covid than those who were fully protected.
There was also a link between skipping doses and hospitalisation and death rates in all age groups studied.
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https://www.bbc.co.uk/news/health-67980238