illustration of green viral particles flowing into a person's nostril
First COVID-19 Human Challenge Trial Reveals Uneven Susceptibility
Only half of volunteers deliberately exposed to SARS-CoV-2 developed an infection. None developed serious symptoms, paving the way for further challenge trials.
ABOVE: © ISTOCK.COM, WILDPIXEL
First COVID-19 Human Challenge Trial Reveals Uneven Susceptibility
First COVID-19 Human Challenge Trial Reveals Uneven Susceptibility

Only half of volunteers deliberately exposed to SARS-CoV-2 developed an infection. None developed serious symptoms, paving the way for further challenge trials.

Only half of volunteers deliberately exposed to SARS-CoV-2 developed an infection. None developed serious symptoms, paving the way for further challenge trials.

ABOVE: © ISTOCK.COM, WILDPIXEL

nose

a close up photo of a black dog nose with blond and white whiskers
Dogs: The New COVID-19 Rapid Test
Kerry Grens | May 24, 2021
Two studies this month point to pooches’ quick detection of SARS-CoV-2 on material that touched the skin of infected participants, although the pups’ accuracy does not match that of RT-PCR.
The Brain’s Immune Cells Stand Sentinel Against Viral Invasion
Ashley Yeager | Oct 1, 2020
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.
Researchers Make Mice Smell Odors that Aren’t Really There
Ruth Williams | Jun 18, 2020
Using optogenetics, scientists have simulated the sense of smell directly within the mouse brain to investigate the nature of olfactory perception.
Chemosensory Cells in the Nose Play a Role in Allergic Reactions
Abby Olena | Jan 17, 2020
In mice, a group of nasal epithelial cells called brush cells release pro-inflammatory signals in response to allergens.
Image of the Day: On the Nose
Carolyn Wilke | Apr 1, 2019
Lab-grown stem cells fill in for damaged tissue in the noses of mice.
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A Keen Sense of Smell Appears to Go Hand in Hand with Spatial Memory
Shawna Williams | Feb 1, 2019
Authors of a small study say the two abilities likely evolved in tandem.
Researchers Develop a Drug Against the Common Cold
Catherine Offord | May 15, 2018
In an in vitro study, the compound completely blocked the replication of rhinoviruses.
How Your Nose Got Its Shape
Karen Zusi | Aug 1, 2016
Climate variation has sculpted our schnozzes since the earliest humans evolved, but environmental pressures can’t explain everything.