Is it necessary to replace the old rural house earth brick wall with red brick?

The earth brick wall is very strong and has been built, there is no need to waste time and energy. And with the continuous development of science and technology, there are already experts who have detected that houses built with red bricks are with radon gas, rays are released, and these chemical elements are threatening human health. If you live in a house built with red bricks for a long time, it will destroy all kinds of cells in the human body, leading to a variety of diseases in the human body.