Kyle Busch's wife, Samantha, breaks silence two weeks after NASCAR driver's stunning death

NASCAR driver Kyle Busch, 41, tragically died from severe pneumonia that escalated into sepsis, his family confirmed. Dr. Cedric Rutland, a pulmonary critical care physician and American Lung Association spokesperson, explains how pneumonia's inflammation and infection can overwhelm the body.

Samantha Busch, the wife of NASCAR driver Kyle Busch, made her first public comments Friday, just over two weeks after his stunning death.

Busch, 41, died May 21 after a battle with pneumonia turned into sepsis. The two-time NASCAR champion collapsed during a simulator session ahead of the Coca-Cola 600, and was rushed to the hospital. He died the next day.

A private memorial was held for Busch earlier this week.

Samantha Busch took to Instagram Friday for the first time since her husband's death, thanking fans for their support in a lengthy post:

NASCAR, RACING WORLD REACTS TO KYLE BUSCH'S SHOCKING DEATH AT 41: 'CANNOT COMPREHEND THIS NEWS'

NASCAR Cup Series driver Kyle Busch and his wife Samantha stand before the start of the 1000Bulbs.com 500 at Talladega Superspeedway in Talladega, Ala., on Oct. 14, 2018. (Jasen Vinlove/USA TODAY Sports)

"As a family, we wanted to take a moment to say thank you. The prayers, messages, flowers, meals, hugs, and countless acts of kindness have carried us through the most heartbreaking days of our lives. While our hearts are absolutely shattered, we have felt God’s presence and arms wrapped tightly around us through each and every one of you.

"The love that has surrounded our family during this unimaginable time has brought comfort in the middle of so much pain. Knowing the impact Kyle had on others and seeing how they are honoring him through each unique act of generosity is a true testament to