Shuttered drugstores pose a particular threat to older adults, who take more medications than younger people and often rely on pharmacies for advice.

© Mette Lampcov for The New York Times

Readers discuss a guest essay by a woman who finds things to cherish in caring for her dad.

Readers discuss staying involved during difficult times. Also: Supreme Court ethics; South Korea’s example; too much feedback; new friendships.

Readers discuss the British vote on the issue and urge actions in the U.S. Also: Safeguarding our food; taxing cow burps in Denmark; a crossword tale.

Habitat for Humanity helps older people who can’t afford to make their homes safe and workable as they age.