The Ratana Sutta, or the Jewel Discourse, is a sutta that Ajahn Anan has recommended chanting particularly in the time of the Covid-19 pandemic. This sutta was taught by the Buddha as a way to help alleviate a plague afflicting the city of Vesali. When the monks chanted the sutta, the plague was dispelled and the city returned to prosperity.

One can listen peacefully or chant along in the Wat Marp Jan chanting book (pages 176-79): https://watmarpjan.org/en/audio-books/books/ (English translation included).