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So far, nearly 80% of California residents have been vaccinated with at least one dose of the COVID vaccine. The extended statewide mask mandate is set to expire on Feb. 15.

A map of confirmed COVID-19 cases and deaths around the world. The respiratory disease has spread rapidly across six continents and has killed millions.

FDA Commissioner Martin Makary discusses vaccine policy, COVID-era decisions and the erosion of trust in government health guidance.

On TikTok, the hashtag "dementia" has 3 billion views. Caregivers of people with Alzheimer's and other dementias have been using the site to swap tips and share the burdens of life with dementia.

A lawyer who lost her job. A single mom with HIV. A grandmother who thought she had enough money to get by. A onetime golf coach. They're among the millions now struggling to put meals on the table.

Researchers launched a major study of an experimental Alzheimer's drug this summer. They also learned a lot about how to protect participants who must make frequent visits to a medical center.

In the midst of record COVID case numbers in the U.S., biostatistician Natalie Dean walks us through how to assess the metrics.

Small-town hospitals were already closing at an alarming rate before COVID-19, but now the trend appears to be accelerating just as the disease arrives in rural America.

A stifling heat wave in the Western U.S. has turned some of its most alluring nature trails deadly. And Utah's recent deaths add to an already tragic toll this summer. Here are some tips to keep safe.

Just saying "hello" to a passerby can be a boon for both of you. That's what researchers are finding in studies we covered in our "Living Better" series. We asked readers to offer their own testimony.