ER doctor reveals how pneumonia can suddenly turn deadly after Kyle Busch’s death

This material may not be published, broadcast, rewritten, or redistributed. ©2026 FOX News Network, LLC. All rights reserved. Quotes displayed in real-time or delayed by at least 15 minutes. Market data provided by Factset. Powered and implemented by FactSet Digital Solutions. Legal Statement. Mutual Fund and ETF data provided by LSEG. Emergency medicine physician Dr. Stephanie Widmer discusses NASCAR icon Kyle Busch’s death and highlights warning signs of severe pneumonia on ‘Fox & Friends.’ The sudden death of Kyle Busch has drawn attention to a rare but devastating medical progression: when pneumonia escalates into fatal sepsis. An ER doctor spoke with Fox News Digital about how sepsis can trigger a rapid health decline. "Sepsis is actually not a specific disease or diagnosis, but rather the syndrome that occurs when the body has certain abnormal findings and a presumed infection," said Dr. Kenneth J. Perry, a South Carolina-based emergency medicine physician. HOW PNEUMONIA PROGRESSES TO SEPSIS: DOCTORS EXPLAIN AFTER KYLE BUSCH'S DEATH The markers of sepsis include elevated white blood cell counts, a high or low temperature, and elevated heart and respiratory rates, according to