Frequent viral and bacterial infections in kids boost nasal immune defenses. That may have protected them from severe COVID, a study finds.

People with COVID-19 who used cannabis were more likely to be hospitalized and require intensive care than those who did not use the drug.

The virus that causes COVID-19 can breach the blood-retinal barrier, leading to potential long-term consequences for the retina and vision.

Lockdown policies intended to curb the spread of COVID appear to have contributed to an increase in drug overdose deaths, researchers find.

Why do some people with COVID-19 experience little more than a sniffle while others end up on a ventilator? New research digs in.

Heavy-drinking young adults reduced their alcohol use during the COIVD-19 pandemic, and those decreases remained as the pandemic waned.

The COVID-19 pandemic altered a long-held convention that doctors provide care regardless of personal risk.

New research finds that in-school tutoring can help kids recover from learning loss they face due to the pandemic.

Researchers have developed a faster, more accurate detection technique to test for COVID-19.

Good airflow and filtration in schools may help children with intellectual disabilities, a vulnerable population, avoid COVID infections.