May 2020
edit
Hello, I'm CLCStudent. I noticed that you added or changed content in an article, Immune system, but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so. You can have a look at the tutorial on citing sources. If you think I made a mistake, you can leave me a message on my talk page. Thank you. CLCStudent (talk) 13:28, 24 May 2020 (UTC)
- What you need to do is find sources that list the functions as primary or secondary. CLCStudent (talk) 13:41, 24 May 2020 (UTC)
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