antibody|antibodies

医生用抗体来检测病毒。

Doctors use ___antibodies to detect viruses.

医生发现他体内有对抗流感的抗体。

The doctor found ___antibodies against the flu in his body.

疫苗能帮助身体产生抗体来抵抗病毒。

Vaccines help the body produce ___antibodies to fight viruses.