SINGAPORE -- Operators of telehealth services, which allow patients to consult virtually with medical staff, are riding a demand surge in the Association of Southeast Asian Nations as the coronavirus pandemic increasingly pushes the healthcare sector online. In Thailand, Indonesia and Singapore, telehealth providers are seeing use of their services pick up on fears that physical visits to clinics and hospitals could lead to contracting COVID-19 while in range of the infected. Such services hold promise for taking some of the load carried by ASEAN's medical institutions grappling with virus cases.