People are pulmonary respiratory animals. When the virus enters the body (the respiratory tract) and overcomes immunity, the flu becomes sick. New variant virus can be a pandemic. That is fate. They cannot be prevented with a mask. Assuming that the virus is 1m, the size of the mask is about 100m2 to 1㎢, and the virus can pass through. Until a specific drug for the virus was discovered, I think “R gargle method “ prevention is the best in the private world.At that time, I was studying Mashijimi. Patented Japan's first Mashijimi breeding aquarium (Japan)Adding new knowledge of the virus from the world of Mashijimi, the effect of the beaker's steam was effective in preventing influenza. After that, I named this preventive Method the "R Gargle Method (see text)" in the first year of Reiwa. Under the "R gargle method",I filed a patent application (in Japan) for a portable preventive device that could apply the "R Gargle Method" anywhere in the world. This book is a report of a patent application for the "R Gargle Method" and "Portable Device". No details are given about the patent. Please understand. (Refer to this document)