Those at the age of 65 and above have priority over the Covid-19 vaccination.
As far as the Covid-19 vaccination is concerned, priority is given to those at the age of 65 and above
"65才以上の人は優先的にワクチン接種できます"
those 人々
priority 優先
コロナワクチン the Covid-19 vaccination
６５歳以上 those at the age of 65 and above
～に関しては as far as ~ is concerned
Those at the age of 65 and above have priority over the Covid-19 vaccination.
As far as the Covid-19 vaccination is concerned, priority is given to those at the age of 65 and above
People 65 and older can get the vaccine preferentially.
People 65 and older can get the vaccine preferentially.
『65歳以上の人々は優先的にワクチンを接種できます。』
preferentially は「優先的に」「優遇して」という意味の副詞で、この状況を直接的に表現できます。65 and older（65歳以上の）は、年齢層を指す一般的な言い方です。
日本 
アメリカ合衆国 
