On Apr. 8, 2020, a team of Texas A&M University researchers led by Michael R. Moreno, in collaboration with Houston Methodist Hospital, announced they had delivered 200 3D-printed diffusers for metered dose inhalers (MDI) to the Houston hospital.

ﾓThe spacer, or diffuser, allow the doctors to use metered dose inhalers to treat diagnosed and suspected COVID-19 patients who are not yet in need of ventilator therapy, without using nebulizers that may aerosolize the virus.