Modern humans and Neanderthals could be forgiven for having other issues on their minds when they interbred in the stone age. But according to researchers, those ancient couplings laid a grim foundation for deaths around the world today.
Scientists have claimed that a strand of DNA that triples the risk of developing severe Covid-19 was passed on from Neanderthals to modern humans. The genetic endowment, a legacy from more than 50,000 years ago, has left about 16% of Europeans and half of south Asians today carrying these genes.
The origins of the risk genes came to light when scientists in Sweden and Germany compared the DNA of very sick Covid-19 patients with that from Neanderthals and their mysterious sister group, the Denisovans. The stretch of DNA that makes patients more likely to fall seriously ill closely matched that collected from a Neanderthal in Croatia.
“I almost fell off my chair because the segment of DNA was exactly the same as in the Neanderthal genome,” Hugo Zeberg, an assistant professor at the Karolinska Institute in Stockholm, told the Guardian.
Zeberg and his co-author, Svante Pääbo, director of the Max Planck Institute of Evolutionary Anthropology in Leipzig, suspect the Neanderthal genes have persisted in modern humans because they were once beneficial, perhaps helping to fight off other infections. Only now – when faced with a new infection – has their downside been exposed.
Carol graduated from Riverside White Cross School of Nursing in Columbus, Ohio and received her diploma as a registered nurse. She attended Bowling Green State University where she received a Bachelor of Arts Degree in History and Literature. She attended the University of Toledo, College of Nursing, and received a Master’s of Nursing Science Degree as an Educator.
She has traveled extensively, is a photographer, and writes on medical issues. Carol has three children RJ, Katherine, and Stephen – one daughter-in-law; Katie – two granddaughters; Isabella Marianna and Zoe Olivia – and one grandson, Alexander Paul. She also shares her life with her husband Gordon Duff, many cats, and two rescues.