1. A study by the Center for Clinical Sciences at the Japan Institute for Health Security found that underweight people are more likely to develop severe COVID-19 symptoms and require life support such as ventilators or ECMO machines, compared to those with normal weight.

2. The research suggests that underweight patients are 1.74 times more likely to die from COVID-19, and the risk increases to 1.89 times when only looking at mortality rates. This is particularly true for underweight individuals aged between 20 and 64 years old.

3. The study leader, Matsushita Yumi, emphasized the need for underweight people to follow anti-infection measures like wearing masks and washing hands, and urged medical professionals to be aware that underweight individuals can also suffer severe COVID-19 symptoms.