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