You must be worried about your grandparents getting the Coronavirus, especially since they are elderly.
Considering how old your grandparents are, I bet you are a bit worried about them coming into contact with someone who has the Coronavirus.
ーYou must be worried about your grandparents getting the Coronavirus, especially since they are so elderly.
「特におじいさん、おばあさんは高齢ですから、コロナウイルスに感染しないか心配ですね。」
get the Coronavirus で「コロナウイルスに感染する」
elderly で「かなり年配の」
ーConsidering how old your grandparents are, I bet you are a bit worried about them coming into contact with someone who has the Coronavirus.
「おじいさん、おばあさんの年齢を思うと、コロナウイルス感染者と接触しないか心配ですね。」
Considering how old your grandparents are で「おじいさん、おばあさんの年齢を思うと、考慮すると」
come into contact で「接触する・出くわす」
ご参考まで！
カナダ 
