Learn why the lack of a single, standard definition of long COVID poses a problem for researchers and clinicians.

The lack of a standardized definition of long COVID is hindering research into the condition, according to a new study ...

“In the absence of an objective measure, like a blood test, or a uniform standard for measuring long COVID, researchers and clinicians will need to decide which definition is best suited for their ...

What is long COVID? Despite hundreds of published studies and millions affected worldwide, the medical field still lacks a ...

Since the end of June alone, the percentage of positive cases in Puerto Rico increased 10-fold, according to Dr. José Rodríguez Orengo, executive director of The Puerto Rico Public Health Trust.

Alexander Tin is a digital reporter for CBS News based in the Washington, D.C. bureau. He covers federal public health agencies. Cases of COVID-19 are now likely growing in 25 states, according to ...

PUERTO RICO - Officials say tests have confirmed three cases of the new coronavirus in Puerto Rico, the first for the U.S. territory. Gov. Wanda Vazquez said Friday night that the public school ...

NB.1.8.1 is part of that lineage. A patient receives a flu and Covid-19 vaccination in Pasadena, Calif., on Oct. 12, 2023. Francine Orr / Los Angeles Times via Getty Images file ...