A recent vaccine trial from Oxford University shows promising preliminary results, suggesting the vaccine can produce immune responses that may protect people against infection. Dr. Sanjay Gupta spoke with Dr. Barney Graham, the deputy director of the Vaccine Research Center at the National Institutes of Health, about the science behind vaccines and how they work.To learn more about how CNN protects listener privacy, visit <a href="https://cnn.com/privacy">cnn.com/privacy</a> Learn more about your ad choices. Visit <a href="https://podcastchoices.com/adchoices">podcastchoices.com/adchoices</a>

Realist or Alarmist? Q&A with Dr. Fauci

All over the world, there are people who are living extraordinary lives, full of happiness and health – and with hardly any heart disease, cancer or diabetes. Dr. Sanjay Gupta has been on a decades-long mission to understand how they do it, and how we can all learn from them. Scientists now believe we can even reverse the symptoms of Alzheimer’s dementia, and in fact grow sharper and more resilient as we age. Sanjay is a dad – of three teenage daughters, he is a doctor - who operates on the brain, and he is a reporter with more than two decades of experience - who travels the earth to uncover and bring you the secrets of the happiest and healthiest people on the planet – so that you too, can Chase Life.