Harvard epidemiologist looks back and ahead.

Researchers have found that “brain water” can exit through tiny channels to reach the skull’s bone marrow, which can detect infection or injury.

The “milder” outcomes of Omicron are likely due to more population immunity rather than the virus’ properties, according to new research.

Traditional dosing regimens of COVID-19 vaccines available in the United States do not produce antibodies capable of recognizing and neutralizing the Omicron variant, reports a new study.