
Obesity linked to 70% higher risk of severe infection, study finds
A Lancet analysis of more than 500,000 adults from Finland and the UK shows that obesity (BMI ≥30) raises the risk of being hospitalized for or dying from infectious diseases by about 70% versus those with a healthy weight, with obesity linked to roughly 11% of infection deaths globally and varying by country (about one in six in the UK, one in four in the US). The study suggests obesity may weaken immune defenses across infections such as flu, pneumonia, COVID-19 and gastroenteritis, and notes the need for policies that support healthy weight and vaccination; however, as it relies on observational data it cannot prove causality, and further research is needed to understand the underlying mechanisms.











