Ahron returned to Moshe at the entrance of the Ohel Moed, and the plague had been checked.
Short stories of Segulahs that helped cease plagues and heal illnesses:
Harav Hachassid R’ Itcha Ausberg z’’l related that a few ‘heimishe Yidden’ passed away in Krakow during a short time. The Chassidim were scared and traveled to Belz to Maran Reb Yissochor Dov zt’’l and asked for a blessing for protection. Maran told them to learn Minshnayos in the shtiebel (Beis Hamedrash) every night between Mincha and Maariv – and the plague stopped.
Harav Hachassid R’ Naftuli Gottesman z’’l retold an episode in the name of Harav Hachassid R’ Haenich of Radim z’’l.
A rare disease was circulating in the city of Belz. Maran, the Sar Shalom of Belz zt’’l, told Harav Hachassid R’ Shraga Feivish of Hivniv z’’l to check the kashrus of the tzitzis from all the city’s inhabitants.
A gentile shepherd once came to Maran Reb Aharon of Belz zt’l, bemoaning his fate. He said there was a terrible plague amongst his animals, and they were dying out.
Maran asked him where his animals graze. Was there a water well nearby? The shepherd answered in the affirmative, and Maran told him to find a different field where his animals should graze and that they won’t die anymore.
The shepherd was amazed by Maran’s answer, saying he was an ‘angel’ that sees everything. However, Maran didn’t want the gentile shepherd to talk about it, so Maran simply told him, “The well caused the earth to be moist, which causes the animals to catch colds and that’s why they died.”