Dr Hugo Zeberg, assistant professor in the department of neuroscience at the Karolinska Institute in Stockholm, Sweden, talks to Jason Goodyer about his research into Neanderthal genes and the impact they could have on COVID-19 patients. How much of the human genome has been inherited from Neanderthals?If you have roots from outside of Africa, then roughly 2 per cent of your DNA is Neanderthal. But if we put all these pieces together, we find more than half of the Neanderthal genome in modern humans. But it will differ between people: some carry some pieces, some carry other pieces. How do...