At the bottom of each post you will now see something like this:
Click for posts exclusively on: CHEMO
This is a feature of the new Blogger release. If you click the link it will bring you to a page with just the posts concerning that particular topic. I have tried to be reasonable in my assignment of these labels, and I hope you like having the ability to see all the "chemo" posts, "diagnosis" posts, "stories" posts, etc.