It makes sense intuitively. Here is a really interesting paper that discusses how gut bacteria manipulate host eating behavior: https://www.ncbi.nlm.nih.gov/pub

It makes sense intuitively. Here is a really interesting paper that discusses how gut bacteria manipulate host eating behavior: https://www.ncbi.nlm.nih.gov/pubmed/25103109 https://www.ncbi.nlm.nih.gov/pubmed/25103109 I'm no expert, but I could see a virus employing a similar mechanism.