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At least 70% of people will need to be immune from the coronavirus before COVID-19 can recede through a process known as herd immunity. Vaccines can play a role. But reaching the goal won't be easy.

A majority of U.S. colleges have canceled spring break, in an attempt to curb student travel. But the rise of online classes means students can now attend college from anywhere, including beachside.

New efforts to minimize the spread of COVID-19 in San Diego, Amazon's Jeff Bezos donates millions to help local climate change research, and a major development in Mission Valley gets final approval from the city.

A prolonged 21-year warming and drying trend is pushing the nation’s two largest reservoirs to record lows. For the first time this summer, the federal government will declare a shortage.

Many children of 9/11 victims were too young to remember their parents who died. They've grown up living with the tension between having a personal connection to the day but few, if any memories.

Growing wildfires have overtaken old-growth redwoods and endangered condor nests, but biologists say they could survive.

California counties are opening mass vaccination centers they say can help curb the coronavirus surge that's killing hundreds a day in the state — but only if they can get the vaccine.

San Diego integrative medicine doctor Robert Bonakdar weighs in on how and who should be taking dietary supplements.

People who have been sick with COVID-19 may need only one dose of the normally two-shot vaccines. If that became policy it could extend vaccine supplies, but logistical challenges are daunting.

A coalition of local Latino elected officials and community leaders want Gov. Gavin Newsom to appoint a Latino man or woman to replace Kamala Harris in the U.S. Senate when she vacates her seat in January.