The Health Information Sharing and Analysis Center (H-ISAC), whose members include big health care providers, has already received threat alerts from the volunteer group. (Getty Images) All hands on deck: Infosec volunteers to protect medical organizations during COVID-19 crisis By day, they are cybersecurity professionals at well-known companies. By night, they are working to protect health organizations from hackers. Mar 20, 2020 By Sean Lyngaas