体調不良のためお休みします。I'm not feeling well, so I'm taking some time off.

最近体調を崩して病院へ行き、コロナウイルスと診断されましたので、回復するまで仕事が難しく、今週いっぱいはお休みさせていただきます。ご迷惑をおかけして申し訳ありません。

I have recently been ill and went to the hospital where I was diagnosed with coronavirus, so it will be difficult to work until I recover, so I will be closed for the rest of the week. We apologize for the inconvenience.