If we filter the water using white-colored clean cotton cloth then this cloth filters all the disease-causing virus, bacteria, etc. from the water. This fact has been scientifically proven. This is the reason why our forefathers did not use any medicine or tablets and did not go to any hospital when children had diseases such as measles. They cured the disease just by bathing the child in water filtered in a white cotton cloth. So, if needed, we can clean the water using this method.