"The study from the University of North Carolina at Chapel Hill finds that people with obesity, with a BMI over 30, are at greater risk from the coronavirus in every way. Their risk of ending up in hospital with Covid-19 is increased by 113%, they are more likely to be admitted to intensive care (74%) and have a higher risk of death (48%) from the virus."
Could this be why the UK and USA have been much more severely affected considering both countries have high obesity rates of 40% and 30% respectively.