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Health Data Research UK


Obesity inequalities in England have widened since COVID-19 – with steepest increases in new cases in young adults

Rates of new obesity cases rose by 4% between 2019 and 2025, with the largest increases seen among young adults. The study also found significant disparities in obesity rates across sociodemographic groups and geographical regions, highlighting the need for deep-seated change to address the underlying factors driving obesity.

SourceHealth Data Research UK·JournalThe Lancet Diabetes & Endocrinology·TypeObservational study·DateJun 24, 2026

Research finds higher rare risk of heart complications in children after COVID-19 infection than after vaccination

A new study analyzing linked electronic health records found that COVID-19 infections led to a higher and longer-lasting risk of rare heart complications, including myocarditis and thrombocytopenia, compared to vaccination. The research team estimated an additional 2.24 cases of myocarditis per 100,000 children after COVID-19 infection.

SourceHealth Data Research UK·JournalThe Lancet Child & Adolescent Health·TypeObservational study·DateNov 4, 2025

Health data for 57 million people in England show changing patterns of heart diseases before, during and after the pandemic

The study analyzed linked health data for over 57 million people in England, finding drops in cardiovascular disease incidence during the pandemic. However, diagnoses rates have returned to pre-pandemic levels, with increased cases of heart failure and inflammation of heart tissue observed after the pandemic.

SourceHealth Data Research UK·JournalThe Lancet Public Health·TypeObservational study·DateOct 27, 2025

Researchers leverage large-scale data to uncover new insights into rare diseases and COVID-19

Researchers uncovered eight rare diseases that carry significantly increased risks for COVID-19-related mortality in fully vaccinated individuals. These conditions, including infertility disorders and kidney diseases, pose a nearly fivefold greater risk of death from COVID-19 than the general population.

SourceHealth Data Research UK·JournalThe Lancet Digital Health·TypeObservational study·DateJan 29, 2025

​​​​​​​Incidence of heart attacks and strokes was lower after COVID-19 vaccination, finds study of 46 million adults

A new study analyzing health records from 46 million adults in England found that COVID-19 vaccination significantly reduces the incidence of heart attacks and strokes. The incidence was up to 10% lower after the first dose and up to 27% lower after two doses, especially with the AstraZeneca vaccine.

SourceHealth Data Research UK·JournalNature Communications·TypeObservational study·DateJul 31, 2024