A federal website that used to feature information on vaccines, testing and treatment for COVID-19 has been transformed ... with dozens of widely varying symptoms, including fatigue and brain ...

Here's what to know about whooping cough amid the growing cases.

One of enduring mysteries of the COVID-19 pandemic is the cause of "long COVID," a collection of symptoms that can appear or persist weeks and months after a person's initial infection has subsided.

Since the COVID-19 pandemic’s peak, a quieter, longer battle has taken root: long COVID. With symptoms ranging from brain fog to chronic fatigue and organ dysfunction, the condition continues to ...