Hello, @backpacker2020 and welcome to Mayo Connect. If you want to search for a topic you can go to "Groups" (top of the page) and it will bring up a number of health-related group topics.
At the top of the page, you will also see a little magnifying glass. If you click on that it will open a text box where you can type in a subject, then hit "Enter" and posts about the topic will become available.
If you would like to mention the topic you are looking for, I can direct you to the best discussion group.
Once again, welcome to the Connect community!