In this phase researchers are looking for side effects within the mice, which can range from mild skin irritation at the site of injection to death.

在这个阶段，研究人员观察疫苗是否会在试验小鼠身上导致任何副作用；副作用可能是轻微的皮肤过敏甚至死亡。

A very clear display of insulin's fattening properties is " Lipohypertrophy" — a well-known phenomenon where people who inject insulin will develop a bulb of fat at the site of injection.

胰岛素增肥特性的一个显著表现就是“脂肪增生”——一种非常著名的现象，病人注射胰岛素的身体部位，会长出一坨肥肉来。