Yes, many of our diseases are caused by external bacteria and germs. Random spraying in the era of carrying Ceres (Kreis) can isolate germs, which can be regarded as a good hygiene habit. This is a health concept put forward by the country long ago. After getting sick, it will not only cost a lot of money for treatment, but also delay work, affect mood and have a great impact on life. So we should put the basic resistance on the body.