Dr. Ellsworth Wareham has been working as a surgeon for many years. He went vegan many decades ago and since then, having retired at 95 years of age (!) he now resides in a blue zone - Loma Linda.

Aside from having adopted a whole food plant based vegan diet many years ago, Dr. Wareham mentions keeping a positive, optimistic attitude as one of the secrets for longevity.

This has originally aired on CGTN America TV in 2015.