This week James Gallagher finds out if the Power of the Dog is true. No not the movie, but the claim that dogs can make us live longer. He’s also doing press ups in the studio to see if small amounts of muscle building exercise can help boost our health no matter how old we are. Then, inspired by the last episode on long Covid, James goes in search of the lost art of convalescence.

It’s a long Covid reunion on Inside Health. We first met Jo, Neil and John in February 2021 when they were 12 months into the condition. Another year on, we catch up with them to see if they are any closer to making a full recovery. We explore how a virus can cause such prolonged symptoms, with Dr David Strain from the NHS Long Covid Taskforce, and see if we are any closer to treating long Covid. PRESENTER: James Gallagher PRODUCER: Beth Eastwood

We get to the bottom of a medical mystery – what causes multiple sclerosis? A series of studies have compellingly pointed the finger at the virus behind glandular fever. We see if they stack up and assess what it means for the future of preventing and treating MS. Then nearly two years since the World Health Organization described Covid as a pandemic, James chats to Dr Maria van Kerkhove, who is the WHO's technical lead for its response to Covid, about the successes and failures of the past two years and where we’re all heading next? Producer: Andrew Luck-Baker

How often do we need a smear test? It’s become controversial now as a new test means women and people with a cervix need checking less often. But in the future the answer might be only once a lifetime! We hunt for the special blood that's in high demand, yet in short supply, for people with sickle cell disease. And could the disruption from the Covid pandemic be setting the stage for a large outbreak of measles? PRESENTER: James Gallagher PRODUCER: Beth Eastwood Credit Image: NHS Blood & Transplant

James meets a record breaking doctor who is analysing DNA so quickly it is transforming treatment in intensive care and from one of his patients, Matthew, who discovered he needed a new heart. Then James has a disgusting confession as we discuss losing weight by getting more sleep. And can we get better therapies for all of us by copying the revolutionary trial that transformed the pandemic.?