Hello, Justifiable27! Welcome to Wikipedia! Thank you for your contributions. You may benefit from following some of the links below, which will help you get the most out of Wikipedia. If you have any questions you can ask me on my talk page, or place {{helpme}} on your talk page and ask your question there. Please remember to sign your name on talk pages by clicking or by typing four tildes "~~~~"; this will automatically produce your name and the date. If you are already excited about Wikipedia, you might want to consider being "adopted" by a more experienced editor or joining a WikiProject to collaborate with others in creating and improving articles of your interest. Click here for a directory of all the WikiProjects. Finally, please do your best to always fill in the edit summary field when making edits to pages. Happy editing! Stickymatch20:52, 11 July 2020 (UTC)[reply]
When investigating a suspected copyright violation, one valuable tool is one that is sometimes known as "WikiBlame". You can access it from the history page and it can tell you when a particular word or passage was added (or removed) from a page. In looking at your edits on Disease, I simply took one phrase "correct premiums" and asked when it was added to the article. The result was this edit from May 2017. Since the book was not published until 2018, the immediate conclusion is that the book copied the Wikipedia article or, perhaps, both were copying an as yet unidentified third source.
People copy Wikipedia incorrectly all the time (by 'incorrectly' I mean without proper attribution). As far as I know, the most that is done is to place a notice on the talk page of the article (there is already one on Talk:Disease referring to a different book). Your notices have already been reverted by another editor, but you could still post the notice on the talk page if you like. — jmcgnh(talk)(contribs)02:29, 12 July 2020 (UTC)[reply]
