- A study conducted in Scotland found that after just one COVID-19 shot, people’s risk of hospitalization suddenly dropped.
- The big work followed people with the Pfizer-BioNTech and AstraZeneca-Oxford shots.
- The news is the latest in a series of promising updates on the real-world effectiveness of vaccines.
- For more stories, visit Insider’s Business section.
Both COVID-19 vaccines allowed for use in the UK appear to significantly reduce a person’s risk of hospitalization from coronavirus after a single vaccine. New data from Scotland.
The figures released earlier on Monday are the first to measure hospitalization rates from the real-world vaccine administration.
It is the last in a series of promising updates from countries that have vaccinated a significant portion of their populations.
Monday’s data analyzed the health records of 5.4 million people – almost the entire population of Scotland – from 8 December to 15 February.
More than 1.1 million of them received a dose of the vaccine developed by Pfizer and BioNTech or developed by AstraZeneca and Oxford University.
Scientists found that those who were vaccinated were significantly less likely to be hospitalized than those who were not.
Looking at overall protection, the study estimates that the risk of hospitalization from COVID-19 dropped by 84% overall, four weeks after a single vaccine was given.
The UK has decided to prioritize giving a single punch to as many people as possible. As a result, relatively few people in the UK have received a second dose, although manufacturers of the two vaccines have recommended that the two doses be given at a set interval of time for complete protection.
Looking at the data, a dose of Pfizer-BioNTech vaccine was linked to an 85% lower risk of hospitalization from COVID-19 (compared to an unvaccinated person) four weeks after the first vaccine, while the AstraZeneca vaccine was a 94% risk of hospital stay over the same period.
The scientists measured the vaccine’s effectiveness every week after taking the first dose. They found the strongest “vaccine effect” at four weeks post-vaccination.
The vaccine effect was highest between the ages of 18 and 64. But within this age bracket, only those identified as clinically vulnerable would be eligible for vaccination.
Among those over 80 who were at highest risk of COVID-19, the vaccines showed an 81% reduction in hospitalization risk after four weeks.
This work has been published as a preprint; The next step will be to be reviewed by colleagues.
Scientists describe it as the first study to look at the impact of a vaccine on hospitalization for the entire nation.
Real world data Israel’s vaccination campaign already found Pfizer-BioNTech vaccine linked to a 94% reduction in symptomatic cases A separate measure of effectiveness among those with two doses of vaccine.
Aziz Sheik, chief scientist at Edinburgh University, said the latest evidence “gives us great reasons to be optimistic for the future.”