Home News and Society ‘Concerning and dangerous’: Asthma organization warns of new social trend using hydrogen peroxide to treat COVID-19 ‘Concerning and dangerous’: Asthma organization warns of new social trend using hydrogen peroxide to treat COVID-19 News and Society 0 Comment The Asthma and Allergy Foundation of America said people have used nebulizers to inhale hydrogen peroxide to treat COVID-19, which can be toxic.