An international group of researchers used the trial data to compare vaccine efficacy and cholera risk between three different age groups: children younger than 5 years, 5 to under 15 years, and those 15 years and older. The research team included biostatisticians from the University of Washington School of Public Health and Fred Hutchinson Cancer Research Center.
Homo sapiens had lots of sex with Homo neanderthalensis. Neanderthal genes supply between 1 percent and 4 percent of the genome in people from homelands on several continents, from Britain to Japan to Colombia.DNA from another human-like primate, the Denisovans, lurks in modern genomes, too.
Humans weren't just making babies with Neanderthals back in the day. A new study that compares the genomes of different groups of modern humans has found that our ancestors interbred with another close relative, the Denisovans, more than once.
Our ancestors mated with another species of ancient hominins, the Denisovans, on at least two occasions. The discovery suggests that Denisovans were widely across Asia, and apparently co-existed happily with modern humans, to the point of having children with them in two different parts of the ancient world.