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What is the "Rule of Twos" for asthma?

What is the “Rule of Twos” for asthma?

English Transcript

Allergist Steve Dorman, MD: The “Rule of Twos” inside asthma is if somebody is well controlled per our guidelines. They use the rescue inhaler less than two times a week during the day, less than two times a month during the night, and they have no limitation during their physical activities.

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