It is also effective in preventing COVID-19 and hand, foot, and mouth disease. By diluting it, it can be used in humidifiers depending on the type, and can also disinfect the space. It will be shipped via Mercari delivery in a recycled cardboard box. The expiration date was at the end of last month, but it is only a recommended expiration date, and there should be no problem as it is diluted and used depending on the application. I think it's a quantity that would be used up quickly in public facilities, nursery schools, and kindergartens.