 This disease is transmitted. First of all, know that in any contaminated water, like this surface water I've just talked about, we have pathogenic organisms inside. Those coming from the influence, that is just an example I have given. And from this surface water, like the river Elb, where the Hanbok wastewater treatment plant dropped the effluent, what is in river Elb. So some of this water, they go for recreational water, like swimming pool, washing, agriculture. This recreational water, agriculture, maybe they take some of this, and then the water, the vegetable that they transport into the market. So drinking, some people drink it or maybe throw food preparation. They use this contaminated water and the food is contaminated. So all these water from the swimming pool, water from bedding, food from the field that has been watered with contaminated water and so on, give rise to water-borne disease. And this water-borne disease has different classes. We have the protozoa, the bacteria, metazoan and viruses. So the protozoa among the water-borne disease constitutes a heavy burden. We are going to see them.