Arizona's largest health system announced Sept. 25 that it plans to give out the new COVID shot after earlier uncertainty.

Vitamin D supplements may offer researchers a new clue about lingering COVID symptoms that persist after infection, according ...

PHOENIX – Experts around the country and in Arizona are raising alarms about the state's COVID-19 situation because cases and hospitalizations have increased for the past two weeks. The increase in ...

Six years ago, on March 11, 2020, the World Health Organization declared COVID-19 a global pandemic. Here's what else happened on that day.

New study reveals vitamin D supplements may reduce long COVID risk by 4%. Promising results for symptoms like fatigue and brain fog in clinical trial.

Several states have issued their own guidance about COVID-19 vaccines since the FDA released its 2025-2026 formula approvals on Aug. 27, significantly restricting who can access the vaccines for the ...

As the respiratory illness season begins, COVID cases have remained relatively under control in the United States into the beginning of fall. While the United States by and large is experiencing ...

Azithromycin was used early in the pandemic to treat COVID-19 in patients and has continued to be used to fight respiratory ...