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COVID-19 Headlines

Explore the latest public health research and insights about COVID-19.

Small child blowing his nose

Is the Hygiene Hypothesis True?

The hygiene hypothesis says exposure to germs helps kids develop healthy immune systems. But many viruses didn’t circulate as widely during the pandemic. Are there downsides to missed infections?

A stack of dominos is key from falling over by a vial of bivalent COVID-19 booster.

Bivalent Covid-19 Booster Updates

Combining proteins from two SARS-CoV-2 variants, bivalent booster shots protect against the currently circulating BA.5 subvariant—and may afford longer-lasting immunity.

COVID-19 Faculty

Looking for prominent public health experts in the field of COVID-19? They’re here at the Bloomberg School of Public Health.

Sabra Klein
Molecular Microbiology and Immunology

Sabra Klein, PhD '98, studies sex differences and the effects of pregnancy on immune responses to viruses, including influenza viruses and SARS-Cov-2, and vaccines.