Especially because some of those lose their effectiveness really quickly.

尤其是因为其中的一些药物很快会失效。

Plus many of these antibodies have lost effectiveness against new variants.

加上许多这类抗体已经没有了对抗新变异的效力。

Antibiotic drugs can lose their effectiveness when people take more or less of than the amount required by doctors.

抗生素药物摄入量高于或低于医嘱用量都会使药物失去作用。

He'd decided he wanted to retire before he lost effectiveness in the classroom.

他决定在课堂效率下降之前退休。

Today, new research shows how old cold viruses may help protect you against the coronavirus causing the pandemic, and vaccine makers are not rushing out shots against the Omicron variant, even though the original shots have lost some effectiveness.

现在，新研究显示古代感冒病毒或许能保护你抵抗导致疫情新冠病毒，而疫苗制造商也并未匆匆生产针剂来对抗奥密克戎变异株，尽管初始疫苗的有效性一部分已经丧失了。