COVID-19 vaccine protects people of all body weights from hospitalization and death, shows study of 9 million adults

COVID-19 vaccines have greatly reduced the number of cases of severe COVID-19 disease for everyone regardless of their body size, according to a new study published in The Lancet Diabetes & Endocrinology. Vaccine effectiveness was similar for those with a higher BMI and of a healthy weight, but slightly lower in the underweight group, who were also the least likely to have been vaccinated.