The GM Chickens that lay eggs with anti-cancer drugs

Chickens have been genetically modified to produce eggs containing high amounts of proteins that are used in cancer treatment. Three eggs containing these proteins are equivalent to one dose of the drug. At roughly 100 times cheaper than producing the drugs in a lab, this new technology is promising and may, in the future, be used on a mass scale to produce these drugs

https://www.bbc.co.uk/news/science-environment-46993649