Double pneumonia is treatable in most cases. Here's why it can turn deadly fast, even in someone young and seemingly healthy.

Kyle Busch's cause of death was severe pneumonia that progressed into sepsis, his family says, after the two-time NASCAR Cup ...

Fans continue to mourn Kyle Busch two days after the NASCAR legend's sudden and shocking death at age 41. Here's what we know.

NASCAR legend Kyle Busch died of severe pneumonia, his family revealed on Saturday ...

Kyle Busch, who won more races in NASCAR's top three series than anyone in history, died suddenly on Thursday.

NASCAR champion Kyle Busch died at 41 from severe pneumonia that progressed into sepsis. His death highlights the dangers of ...

Two-time NASCAR Cup Series champion Kyle Busch died May 21 after severe pneumonia led to sepsis, his family announced.

The two-time Nascar champion was confirmed to have died from severe pneumonia that progressed into sepsis, his family said in a statement Saturday ...

NASCAR driver Kyle Busch died from severe pneumonia that progressed into sepsis, according to a statement provided by his ...

NASCAR driver Kyle Busch died from complications of severe pneumonia that progressed into sepsis, “resulting in rapid and ...

Kyle Busch's family shared that medical evaluations confirmed severe pneumonia, which progressed into sepsis and ultimately ...

The family of NASCAR legend Kyle Busch said he died of severe pneumonia that “progressed” into sepsis. In a statement ...