YOU SAID:

It's not a sickness, its a disease.

INTO JAPANESE

それは病気じゃない、病気です。

BACK INTO ENGLISH

It's not sick, sick.

INTO JAPANESE

それは、病気、病気ではないです。

BACK INTO ENGLISH

It is sickness and disease is not.

INTO JAPANESE

それは病気と病気ではないです。

BACK INTO ENGLISH

It is sickness and disease is not.