Regeneron's CEO tells Maria Bartiromo the company is working to develop a coronavirus treatment 'as fast as we can' "One has to come up with something rapidly that might attack the virus," Dr. Leonard Schleifer said on "Mornings with Maria." "We are scaling up as fast as we can. We hope to be in clinical testing sometime in June." More on this For more news, please go to FoxBusiness.com and watch Fox Business Network.