Few stories underline how quickly sepsis can strike—and how deadly it can be—more than the sudden, heartbreaking death of NASCAR icon Kyle Busch this week.
News of Busch’s passing has left fellow drivers and fans reeling, particularly because many had seen the two-time NASCAR Cup Series champion just days earlier. What began as serious pneumonia is reported to have escalated into a fatal infection.
Only a short time ago, the celebrated racer was still competing at the sport’s highest level, even taking victory less than two weeks before his death at the 2026 Ecosave 200. Yet within a fortnight, an unexpected sepsis reaction claimed his life on May 21.
As tributes poured in and supporters struggled to process the abrupt loss, a doctor explained how an illness as common as pneumonia can sometimes spiral into sepsis, with devastating consequences.
“Sepsis is more common and more unpredictable than most people realize,” Dr Jamin Brahmbhatt wrote for CNN after Busch’s death renewed attention on the risks of sepsis—something many people have heard of, but far fewer fully understand.
He noted that sepsis isn’t the infection itself. Instead, it’s the body going into overdrive—an extreme immune response to infections such as pneumonia—where the body’s attempt to fight back can end up causing severe harm.
Dr Brahmbhatt said: “Pneumonia isn’t the only infection that can lead to sepsis. A skin infection that keeps spreading and raises your heart rate. A urinary tract infection that suddenly lowers your blood pressure.
“An infected kidney stone that raises your temperature – these are not just infections anymore. They could be sepsis.”
In the US, sepsis is among the leading causes of hospital deaths. Roughly 1.7 million Americans develop the condition each year, and about 350,000 die from it annually.
Despite how often it occurs, Dr Brahmbhatt warned that the condition is frequently missed in its early stages because people don’t always connect everyday infections with the possibility of sepsis.
He also addressed widespread misunderstandings about how infections behave once sepsis begins.
“Many people think of infections as staying in one part of the body,” Dr Brahmbhatt added, explaining that sepsis can rapidly expand into something far bigger than the initial illness.
He said: “Sepsis is like a kitchen fire that triggers sprinklers throughout an entire building. The original problem may start in one area, but suddenly the emergency response spreads much farther than intended or needed.
“The body is trying to contain the threat. But in some situations, the inflammatory response becomes wide enough that blood pressure falls, oxygen levels suffer and organs begin to fail.
“That is what makes sepsis dangerous. The infection matters, but the body’s response matters just as much, if not more.”
The doctor also discussed how someone who appears healthy—such as a 41-year-old elite athlete—can deteriorate in a matter of days, even with no obvious warning signs.
“Most sepsis cases happen in people with at least one risk factor – older adults, infants, people with chronic conditions like diabetes or cancer, weak immune systems, or anyone recently hospitalized or recovering from surgery,” he explained.
Dr Brahmbhatt added that the CDC estimates ‘about one in five sepsis hospitalizations are cancer related,’ and stressed that underlying health issues can sometimes accelerate a decline in ways that aren’t visible from the outside.
He added: “That is why it is hard to look at public accounts involving sepsis and automatically assume someone waited too long, ignored symptoms or received the wrong care. Those situations do happen. But sepsis can also develop despite timely evaluation and treatment.”
According to Dr Brahmbhatt, recognizing when an infection is shifting into sepsis is crucial, and he highlighted the TIME acronym as a practical way to remember key warning signs.
T: Temperature – higher or lower than normal.
I: Infection – any sign of one.
M: Mental decline – confusion, sleepiness, hard to wake.
E: Extremely ill – severe pain, shortness of breath or a feeling that something is very wrong.
He emphasized that anyone who develops confusion alongside an infection should seek urgent medical care, as fast action can be the difference between recovery and a rapid, life-threatening decline.