Covid-19__Obesity weakens the immune system and may reduce the effectiveness of a future vaccine

individuals with obesity were more at risk for COVID‐19 positive, 46.0% higher for hospitalization, 113% higher for ICU admission, 74% higher for mortality...A major concern is that vaccines will be less effective for individuals with obesity. 
https://onlinelibrary.wiley.com/doi/full/10.1111/obr.13128

PS - Does that mean Covid-19 is "putting the planet on a diet" thus helping to feed 10 billion people by 2050 while also protecting the environment?

"Global consumption of foods such as fruits and nuts would double, while the world’s appetite for red meat and sugar would be cut in half" 
https://www.nationalgeographic.com/magazine/2020/01/how-we-can-feed-ten-billion-people-without-destroying-the-environment-feature/