Recently, a new study pointed out that people who often stay up late are 466% more likely to be hospitalized if they become "Yang". This study published in the American journal "Chronobiology International" by University of Bergen, Norway, and the Chinese University of Hong Kong, China, shows that often stays up late and works night shifts. Although it does not increase the risk of contracting new coronavirus, the risk of severe illness after being "yang" is significantly increased.
The study analyzed 7,141 participants from four continents and 15 countries, including China (Hong Kong), the United States, Brazil, France, Germany, etc., of which a total of 1,134 people were infected with the new crown.
The results found that among shift/night shift workers, the new crown infection rate was 22.5%, which was slightly higher than regular day workers (17.0%) and non-scheduled day workers (17.3%).
Once infected, shift/night shift workers are at higher risk of developing moderate or even critical illness, and are more likely to have symptoms lasting more than 8 weeks after infection.
Specifically, compared with participants who worked regular day jobs, shift/night workers had a 171% increased risk of developing mild to moderate or critical illness, and a significantly increased 466% chance of requiring hospitalization.

researchers explained that this is mainly because circadian rhythm disorders have a huge impact on the immune system . This study also reminds you from the side: you should not stay up late after being infected with the new coronavirus.
Liu Qingquan, the president of Beijing Hospital of Traditional Chinese Medicine, also pointed out in an interview with CCTV that turning negative for the new coronavirus does not mean the end of the battle with the virus. After turning negative, the body enters a relatively vulnerable period. The pace of life and work must be slowed down, and don't stay up late.
source/cctv.com