Many species of birds and other vertebrates form pair bonds and mate with just one other individual for much of their lives. But the unions don’t always work out. Scientists want to know the underlying factors.
As researchers test existing vaccines for nonspecific protection against COVID-19, immunologists are working to understand how some inoculations protect against pathogens they weren’t designed to fend off.
Government incentives, advances in technology, and an army of patient advocates have spun a successful market—but abuses of the system and exorbitant prices could cause a backlash.