We have to take precautionary measures to help protect people from the Coronavirus, so we're having smaller classes these days.
ーWe have to take precautionary measures to help protect people from the Coronavirus, so we're having smaller classes these days.
「コロナウイルスの予防策を取らなければいけないので、最近クラスを少人数にしています。」
take precautionary measures で「予防策を取る・予防策を講じる」
protect people from the Coronavirus で「コロナウイルスから人々を守るため」
have smaller classes で「小さいクラスを持つ」=「少人数のクラスを持つ」
ご参考まで!