但是因为这种病毒能够通过变异非常老练地逃过身体的免疫系统，每年都产生许多新的变种。

But because the virus is so adept at eluding the body's immune system via mutation, many new varieties crop up each year.

youdao

这些常见的遗传变异在针对生物学途径方面和藏匿对少数家庭有较大影响的罕见变种的基因方面同样有着作用。

These common genetic variants are [also] useful in pointing to biological pathways or genes that might harbor rarer variants with larger effects in a few families.

youdao

这个变种即所谓的G变异。

This is the so-called G variant.

youdao