The National Institute of Infectious Diseases and others have summarized the analysis results that people who took off their masks at dinner and drinking parties were four times more likely to be infected with the new coronavirus than those who did not. rice field.
It is important to wear a non-woven mask, especially when there is a high risk of infection.
From June to July, groups such as the National Institute of Infectious Diseases have targeted 753 unvaccinated adults who visited five outpatient clinics in Tokyo for the last two weeks. The risk of infection was analyzed by comparing the behaviors of the patients.
The test was positive in 257 and negative in 496, and the analysis showed that people who had their masks removed at dinner and drinking parties were 3.92 times more likely to get infected than those who did not. It was.
On the other hand, those who had a "mask dinner" with masks except when eating and drinking were not much different from those who did not.
Looking at the infection risk of people who had dinner by mask type, urethane masks were 1.87 times higher and cloth masks and gauze masks were 1.82 times higher than those with non-woven masks.
The research group said that it is important to wear a non-woven mask especially when there is a high risk of infection, and Director Motoi Suzuki said, "When you meet people, wear a non-woven mask properly and avoid long meals with a large number of people. ".
Number of dinners and drinking parties Differences in risk depending on the number of participants
As a result of the analysis, it became clear that the risk of infection differs depending on the number of times and the number of people who participate in dinner and drinking parties.
Comparing the risk of infection by the number of times they attended a dinner or drinking party, the higher the number, the higher the risk of infection, and the number of people who participated three or more times was 2.14 times that of those who did not participate in the dinner or drinking party.
In addition, it was 2.18 times when there was drinking.
Regarding the location, it was found that the risk increases by 2.10 times even at home alone and 1.55 times in the case of restaurants, bars and taverns regardless of location, and by time of day it is as high as 2.12 times in the evening and at night. It is possible that the nighttime stays longer at dinner and drinking parties and the degree of sickness is greater.
In addition, there is a difference in the risk of infection depending on the number and time of participants in the dinner and drinking party, and the number of people present at the dinner and drinking party is 2.16 times that of those who did not use the cafe. If the staying time was 2 hours or more, it was 1.87 times higher.
On the other hand, using cafes and coffee shops and eating out alone are not obvious risk factors, "it is suggested that eating alone or in small groups during the day may not increase the risk of infection." In addition, the risk of infection did not change significantly due to the use of department stores and shopping centers, and activities such as commuting by train.