当疫情好转后，英语中常用的表达是"when the pandemic improves"或"when the situation improves". "Improve"在英语中的意思是改善，升级。例如：
The situation is improving day by day. (情况日益改善。)
I hope that the pandemic will improve soon. (我希望疫情会很快好转。)
When the weather improves, we can go outside and enjoy the sunshine. (天气好转后，我们可以出去享受阳光。)
希望这些信息对您有帮助！