Teladoc Teladoc (NYSE: TDOC) is one of the world's largest providers of telehealth services and is continuing to grow its business at an astonishing pace. High inflation and concerns that the extremely contagious Delta variant could usher in new waves of coronavirus lockdowns around the globe continue to fuel investor anxiety about another potential market crash. Teladoc's dual acquisitions of fellow virtual-care company InTouch Health and applied signals giant Livongo in 2020 have enabled it to tap into millions of new potential users.