YOU SAID:
my dad has a bad case of corona
INTO JAPANESE
私の父はコロナの悪いケースを持っています
BACK INTO ENGLISH
My dad has a bad case of corona
INTO JAPANESE
私の父はコロナの悪いケースを持っています
BACK INTO ENGLISH
My dad has a bad case of corona
That didn't even make that much sense in English.