YOU SAID:

my brother is now at home because coronavirus put a stop to his university course

INTO JAPANESE

コロナウイルスが彼の大学のコースをやめたので、兄は今家にいます

BACK INTO ENGLISH

My brother is now at home as Coronavirus quit his college course

INTO JAPANESE

コロナウイルスが大学の授業をやめたので、兄は今家にいます

BACK INTO ENGLISH

My brother is at home now because the coronavirus has quit college classes

INTO JAPANESE

コロナウイルスは大学の授業をやめたので、兄は今家にいます

BACK INTO ENGLISH

My brother is at home now because the coronavirus has quit college classes