Medical science says that all the cells in the body are replaced within 1 year. Then why do cells with diseases remain unchanged?

Question - Gurudev, medical science says that all the cells in the body are replaced within 1 year. Then why do cells with diseases remain unchanged?

Gurudev Sri Sri - Because the memory is stuck to the cells, if the memory changes these cells also change. This happens with pranayam, meditation and yoga. Medicine and knowledge bring changes. Sometimes mind clings to the events of the past, this impacts the cells of the body. With a change of mindset the body also changes.