firefighter; occupational disease; presumption

HB 2679 creates a presumption that certain heart-related, perivascular, or pulmonary injuries, illnesses, or deaths in firefighters are work-related occupational diseases if they occur within 24 hours of a known incident during duty. To qualify, firefighters must have passed pre-employment physicals (without pre-existing conditions), followed NFPA 1582 medical standards, and been exposed to a specific event. Employers can only rebut this presumption with clear evidence of a pre-existing non-work condition that independently caused the issue, excluding factors like age, family history, or lifestyle. The bill explicitly states that tobacco use outside work duties cannot be used to challenge the presumption.