The invention of farming brought humans and animals much closer and humans probably developed stronger immune systems to ﬁght infections from the animals. But the change to humans’ immune systems may not be as big as scientists thought – tests on the hunter-gatherer’s DNA found that he already had genes that made his immune system strong. Some of these genes still exist in modern Europeans today. “Before we started this work, I had some ideas of what we were going to ﬁnd,” said Carles Lalueza-Fox, who led the study at the Institute of Evolutionary Biology in Barcelona. “Most of those ideas turned out to be completely wrong.”
What does Lalueza-Fox say about the study results?
She found them to be surprising They supported her previous ideas They show how humans developed better immune systems to deal with infections from farm animals They describe the appearance of the Mesolithic man with unprecedented accuracy