1 sentence for 反复 (fǎn​fù — relapse)

1. 感冒虽然好了，但如果不注意很容易反复。

   gǎn​mào suī​rán hǎo le, dàn rú​guǒ bù zhù​yì hěn róng​yì fǎn​fù.

   Although the cold is gone, it can easily recur if you're not careful.

   Source: Dong Chinese Dictionary