https://www.healthcentral.com/article/the-hygiene-hypothesis-does-cleanliness-cause-asthma
Asthma

The Hygiene Hypothesis: Does Cleanliness Cause Asthma?

    John Bottrell

    John Bottrell

    John Bottrell is a registered Respiratory Therapist. He wrote for HealthCentral as a health professional for Asthma and Chronic Obstructive Pulmonary Disease (COPD).