Hi CM32, and thanks for your inquiry. I see my colleague, , has already answered your question by providing a link to an article which focuses on your concern about COPD and flare-ups, sometimes referred to as acute exacerbations. I do hope you have an opportunity to look over the material.
If there is anything further we can assist you with, please let me or any other moderator / team member know.
Wishing you well,
Leon (site moderator COPD.net)