With this month marking five years since the start of the COVID-19 pandemic, many are looking back and thinking about the experience and the lessons learned.

Among those on the frontlines was Dr. Jaspal Singh, a pulmonologist in Charlotte with Atrium Health. When Singh decided to study the respiratory system all those years ago, he said he had no idea his expertise would be so critical in one of the most challenging and devastating points in global history.

More from Vanessa Ruffes: https://www.wcnc.com/article/news/health/coronavirus/charlotte-doctor-reflects-on-vaccine-turning-point-five-years-after-pandemics-start/275-813dde66-91d2-4806-a0dd-50c5188ddd90