Some viruses, possibly even SARS-CoV-2, can sneak into the brain through the nose. Recent studies show that microglia are ready for them when they do.

Using optogenetics, scientists have simulated the sense of smell directly within the mouse brain to investigate the nature of olfactory perception.

In mice, a group of nasal epithelial cells called brush cells release pro-inflammatory signals in response to allergens.

Lab-grown stem cells fill in for damaged tissue in the noses of mice.

Authors of a small study say the two abilities likely evolved in tandem.

In an in vitro study, the compound completely blocked the replication of rhinoviruses.

Climate variation has sculpted our schnozzes since the earliest humans evolved, but environmental pressures can’t explain everything.