介绍： 1. vaccine: 疫苗
There has no vaccine against the coronavirus so far.
You need vaccine if you want to go to some countries in Africa.

2. flu: 流感
The flu outbreak in America has taken the lives of thousands.
He’s got a fever. It might be the flu.

3. catch a cold: 感冒
She called in sick today. She’s got ...

介绍： 1. vaccine: 疫苗
There has no vaccine against the coronavirus so far.
You need vaccine if you want to go to some countries in Africa.

2. flu: 流感
The flu outbreak in America has taken the lives of thousands.
He’s got a fever. It might be the flu.

3. catch a cold: 感冒
She called in sick today. She’s got a cold.