A red, parasitic worm turned out to be behind the woman's wide array of symptoms. | Credit: Hossain, M., Kennedy, K. J., ...

Scientists have found that a special component in some people's blood provides them with natural protection against malaria.

Red blood cells normally cannot move on their own; they lack any of the cell structures needed for movement. Instead, they deliver oxygen throughout the body by going with the flow of blood. So, when ...