Before the immunoassay, health professionals draw blood from an individual.

在进行免疫测定之前，卫生专业人员会从个体身上抽血。

PCR and immunoassays are always in the process of becoming more accurate and efficient.

PCR 和免疫测定始终在变得更加准确和高效的程中。

Immunoassays are especially important when it comes to retroactively diagnosing people who were infected but went untested.

在追溯断已感染但未经检测的人时，免疫测定尤为重要。

Immunoassays, on the other hand, tap into the immune system's memory of the virus, showing if someone has previously been infected.

另一方面，免疫测定利用免疫系统对病毒的记忆，显示某人以前是否被感染。

Immunoassays may detect IgG antibodies, the most abundant class, and IgM antibodies, the type that's first produced in response to a new infection.

免疫测定可以检测 IgG 抗体（最丰富的一类）和 IgM 抗体（应对新感染而首先产生的抗体）。

And although immunoassays are difficult to develop quickly, researchers in Singapore were able to create one for SARS-CoV-2 even before COVID-19 was declared a pandemic.

尽管免疫测定很难快速发展，但新加坡的研究人员甚至在 COVID- 19 被宣布为大流行病之前就能够为 SARS- CoV- 2 创建一种免疫测定。