Older adults with less wealth had sharper declines in many measures of physical and mental health than those with more wealth.

Although most people who recovered from COVID-19 had low levels of antibodies to SARS-CoV-2 in their blood, researchers identified potent infection-blocking antibodies.

Specific gut bacteria influenced eating decisions in worms by affecting their response to odors. The findings give insight into one way gut microbes may affect behavior.