airway

At two months old, he had his first major surgery, a tracheostomy - a hole in his windpipe to give him an alternative airway for breathing.

"Or on a clinic day, I will see some 20 patients and I'm often the doctor who will be asked to help if people have life-threatening problems with their airways."

The study, published in the journal Addiction, warned about side effects including airway compromise and skin ulcers - or “tissue necrosis” - which can lead to limb amputation.

Increases in ozone are important because ground-level ozone can cause a wide array of health problems, including decreased lung function and inflammation of airways, contributing to hundreds of thousands of deaths each year.

As Peyton's symptoms persisted, the toddler showed discomfort as she scratched her nose, further leading her parents to believe she had something trapped in her airway.