The reason eggs have been so expensive recently is that tens of millions of egg-laying hens in the United States have died as a result of a bird flu virus called H5N1. Almost two decades ago, Michael Greger M.D. wrote Bird Flu: A Virus of Our Own Hatching, a book diving deep into zoonotic diseases, their history and causes, their potential to trigger a devastating human pandemic, and our roles in their emergence, spread, and, hopefully, eradication.
Today, with the harrowing increases in bird flu cases in the United States, these infectious diseases are once again top of mind, forcing us to examine the consequences of the industrial farming of animals.
Read the entirety of his original book, Bird Flu: A Virus of Our Own Hatching for free at:
https://h5n1book.org/
Bird flu aside, consumption of eggs has been linked to many significant harms. Check out this topics page:
https://nutritionfacts.org/topics/eggs/