When a person gets the Coronavirus even though they've been vaccinated twice, it's called 〇〇.
ーWhen a person gets the Coronavirus even though they've been vaccinated twice, it's called a breakthrough infection.
「ワクチンを2回受けたのにコロナに感染するのは、ブレークスルー感染と呼ばれている」
to get the Coronavirus で「コロナウイルスに感染する」
to be vaccinated twice で「2回ワクチンを接種する」
a breakthrough infection で「ブレークスルー感染」
even though they've been vaccinated twice の代わりに
even though they've been fully vaccinated
とも言えます。
ご参考まで！
カナダ 
