At one point, bedbugs were almost completely gone in Japan, but they have started to spread again in recent years.
この場合、次のような言い方ができますよ。
ーAt one point, bedbugs were almost completely gone in Japan, but they have started to spread again in recent years.
「一時期、トコジラミは日本からほぼ完全に撲滅されたが、近年また発生し始めている」
at one point「ある時期」
bedbugs「トコジラミ」
to start to spread「広がり始める」
in recent years「近年では」
ご参考まで!