Coronavirus has sparked a new conversation about the difference between ventilators, CPAP and BiPAP machines.

CPAP and BiPAP machines generally are used for people who suffer from sleep apnea, but could be used in the absence of conventional ventilators.

More than 17 million masks for BiPAP and CPAP machines have been recalled, according to the U.S. Food and Drug Administration.

More than 17 million masks for BiPAP and CPAP machines have been recalled, according to the U.S. Food and Drug Administration.

BiPAP and CPAP masks help people with obstructive sleep apnea, respiratory insufficiency or respiratory failure — health conditions that cause pauses in breathing during sleep.

Philips Respironics is recalling millions of CPAP, BiPAP and ventilators due to potential health risks related to polyester-based polyurethane sound abatement foam.

More than 17 million masks for BiPAP and CPAP machines have been recalled, according to the U.S. Food and Drug Administration.