Annual Legionella Conference to address major health crisis A virtual special session of the annual Legionella Conference co-hosted by NSF Health Sciences and the National Environmental Health Association (NEHA) will focus on disease prevention from waterborne pathogens during a public health crisis. Previously set for January 2021 in Chicago, this special session of the conference has been rescheduled as an interactive virtual event due to the ongoing pandemic. Hosted by NSF Health Sciences, LLC., an NSF International company, and NEHA, the Legionella Conference is an annual national event that brings together hundreds of stakeholders to discuss issues and challenges related to building water systems.