Researchers discover that COVID-19 uniquely causes brain inflammation and disrupts serotonin/dopamine pathways, explaining "brain fog" in Long COVID.

An analysis comparing the effects of influenza versus COVID-19 in mice found differences in how lungs heal after infection and potentially shed light on why COVID-19 causes neurological issues such as ...

The research team used electronic health records data to divide patients into four groups to track symptoms across different obesity levels.

A new Northwestern Medicine study invited users to track their long COVID-19 symptoms over time through an interactive mobile app, which curbed tracking struggles for patients. “Your doctor is not ...

The timing of symptom onset depends on lots of factors, including the amount of virus to which someone was exposed, Hotez says. Their level of pre-existing immunity may also affect the likelihood or ...

Add Yahoo as a preferred source to see more of our stories on Google. What are the most common COVID-19 symptoms doctors are seeing in October 2025? Read on to find out what to look out for, how to ...

It's not easy to tell these health conditions apart based on their symptoms alone. Find out about the differences between these illnesses.

That tickle in your throat or runny nose may be much more than a common cold; it could be the flu (or worse, COVID-19), any of which could derail your Christmas and New Year's Eve plans. Common cold, ...