to shorten the amount of time one has to self-isolate
ーto shorten the amount of time one has to self-isolate
「隔離の期間を短くする」
to shorten で「短くする・短縮する」
例：
I hope we don't have to self-isolate as long when we come back to our own country.
「自国へ帰って来くるとき、そんなに長く隔離しなくても良いといいのに」
ご参考まで！
カナダ 
