Harvard Medical School Coverage
Researchers suggest coronavirus can linger in air for hours
As more people venture out during the pandemic, there are still a lot of unknowns about coronavirus, including how it spreads and how contagious it is. Some experts believe the threat is bigger than health officials first recognized.
Study: Stressed-out people may have smaller brains
The study, published in the journal 'Neurology,' found people with higher levels of cortisol (the stress hormone) had impaired memories and smaller brains.