Linsey Marr
@linseymarr.bsky.social
Engineering professor at Virginia Tech with expertise in air pollution, airborne microbes, nanotechnology. Avid recreational athlete.
We're leveraging our flu human challenge study at Emory University. Participants will talk, sing, and cough into a modified version of our sampling tunnel described at www.medrxiv.org/content/10.1..., with and without far-UVC lamps. Bill Lindsley redesigned the tunnel.
November 14, 2025 at 1:28 AM
We're leveraging our flu human challenge study at Emory University. Participants will talk, sing, and cough into a modified version of our sampling tunnel described at www.medrxiv.org/content/10.1..., with and without far-UVC lamps. Bill Lindsley redesigned the tunnel.
Thanks to Erica Hartmann for leading a newly published paper, "Ten questions concerning indoor dust."
What is it?
Where does it come from?
How does it mediate environmental exposures?
How does it affect chemicals indoors?
www.sciencedirect.com/science/arti...
What is it?
Where does it come from?
How does it mediate environmental exposures?
How does it affect chemicals indoors?
www.sciencedirect.com/science/arti...
November 10, 2025 at 4:56 PM
Thanks to Erica Hartmann for leading a newly published paper, "Ten questions concerning indoor dust."
What is it?
Where does it come from?
How does it mediate environmental exposures?
How does it affect chemicals indoors?
www.sciencedirect.com/science/arti...
What is it?
Where does it come from?
How does it mediate environmental exposures?
How does it affect chemicals indoors?
www.sciencedirect.com/science/arti...
Healthy indoor air is a proven prescription for public health that can help fortify our buildings and enhance people’s health, protecting against respiratory diseases and illnesses, cardiovascular disease and cognitive decline.
resources.wellcertified.com/press-releas...
resources.wellcertified.com/press-releas...
October 14, 2025 at 1:03 PM
Healthy indoor air is a proven prescription for public health that can help fortify our buildings and enhance people’s health, protecting against respiratory diseases and illnesses, cardiovascular disease and cognitive decline.
resources.wellcertified.com/press-releas...
resources.wellcertified.com/press-releas...
I have a lot of travel coming up, and it's that time of year, so I just got my flu and COVID shots.
October 10, 2025 at 2:06 PM
I have a lot of travel coming up, and it's that time of year, so I just got my flu and COVID shots.
You know Jeff Siegel is in town when he whips out deodorant to see if its terpene emissions react with ozone from my new far-UVC lamps to generate secondary aerosol.
He gave a great seminar about HVAC filter forensics!
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
He gave a great seminar about HVAC filter forensics!
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
October 3, 2025 at 8:35 PM
You know Jeff Siegel is in town when he whips out deodorant to see if its terpene emissions react with ozone from my new far-UVC lamps to generate secondary aerosol.
He gave a great seminar about HVAC filter forensics!
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
He gave a great seminar about HVAC filter forensics!
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Influenza A virus RNA found in airborne particles from pigs across a range of particle sizes. For reference a 10 micron particle takes ~8 minutes to settle to the ground from a height of 5 feet. That's plenty of time for it to drift around and be inhaled by others.
September 29, 2025 at 3:41 PM
Influenza A virus RNA found in airborne particles from pigs across a range of particle sizes. For reference a 10 micron particle takes ~8 minutes to settle to the ground from a height of 5 feet. That's plenty of time for it to drift around and be inhaled by others.
The momentum for clean indoor air continues to build. I attended the inaugural High-Level Side Event on indoor air quality at the UN General Assembly yesterday. Short remarks by Lidia Morawska @joeallenjoe.bsky.social @isiaq.bsky.social Pres. Kerry Kinney, ASHRAE, WHO, UNEP, many others.
September 24, 2025 at 4:36 PM
The momentum for clean indoor air continues to build. I attended the inaugural High-Level Side Event on indoor air quality at the UN General Assembly yesterday. Short remarks by Lidia Morawska @joeallenjoe.bsky.social @isiaq.bsky.social Pres. Kerry Kinney, ASHRAE, WHO, UNEP, many others.
Bill Lindsley and I are at Emory University with Seema Lakdawala and Matt Pauly testing our sampling tunnel that we use to collect virus from exhaled breath of infected people.
September 11, 2025 at 6:27 PM
Bill Lindsley and I are at Emory University with Seema Lakdawala and Matt Pauly testing our sampling tunnel that we use to collect virus from exhaled breath of infected people.
In EPA's Air Cleaning Allies activity book, Merv, Aerie, and DJ remind me of Rumi, Mira, and Zoey of K-Pop Demon Hunters. Particles in the air are the demons.
August 26, 2025 at 4:20 PM
In EPA's Air Cleaning Allies activity book, Merv, Aerie, and DJ remind me of Rumi, Mira, and Zoey of K-Pop Demon Hunters. Particles in the air are the demons.
Back to school on the other side of the lectern: I'm on sabbatical and am taking Virology @virginiatech.bsky.social (for a grade), hoping to gain fresh insight into my lab's research on virus inactivation and improve my teaching by being a student again.
August 25, 2025 at 4:52 PM
Back to school on the other side of the lectern: I'm on sabbatical and am taking Virology @virginiatech.bsky.social (for a grade), hoping to gain fresh insight into my lab's research on virus inactivation and improve my teaching by being a student again.
Marc Edwards and I @macfound.org
joined two other @vtengineering.bsky.social faculty members to discuss the importance of sharing our research with the public through media interviews, during a
@virginiatech.bsky.social event for alumni.
joined two other @vtengineering.bsky.social faculty members to discuss the importance of sharing our research with the public through media interviews, during a
@virginiatech.bsky.social event for alumni.
June 9, 2025 at 4:10 PM
Marc Edwards and I @macfound.org
joined two other @vtengineering.bsky.social faculty members to discuss the importance of sharing our research with the public through media interviews, during a
@virginiatech.bsky.social event for alumni.
joined two other @vtengineering.bsky.social faculty members to discuss the importance of sharing our research with the public through media interviews, during a
@virginiatech.bsky.social event for alumni.
My former postdoc @nishit-shetty.bsky.social and I contributed to the development of a "calm-aerosol settling chamber" by Daniel Perez' lab. It will enable pre-screening of pandemic potential of viruses and expand capabilities to study transmission. journals.asm.org/doi/10.1128/...
June 6, 2025 at 6:52 PM
My former postdoc @nishit-shetty.bsky.social and I contributed to the development of a "calm-aerosol settling chamber" by Daniel Perez' lab. It will enable pre-screening of pandemic potential of viruses and expand capabilities to study transmission. journals.asm.org/doi/10.1128/...
At the Randall Lecture @virginiatech.bsky.social today, Ali Boehm told a scintillating story about finding oddly high levels of flu virus (H5N1) in wastewater before it was identified in cows. @wastewaterscan.bsky.social is a great resource!
April 25, 2025 at 9:42 PM
At the Randall Lecture @virginiatech.bsky.social today, Ali Boehm told a scintillating story about finding oddly high levels of flu virus (H5N1) in wastewater before it was identified in cows. @wastewaterscan.bsky.social is a great resource!
Excellent lecture by @holdenthorp.bsky.social (Research Integrity and Scholarly Excellence @virginiatech.bsky.social) about regaining public trust in science: be humble and meticulous, admit mistakes and correct them, answer questions. Universities should shift their focus toward teaching.
April 22, 2025 at 6:21 PM
Excellent lecture by @holdenthorp.bsky.social (Research Integrity and Scholarly Excellence @virginiatech.bsky.social) about regaining public trust in science: be humble and meticulous, admit mistakes and correct them, answer questions. Universities should shift their focus toward teaching.
How are bioaerosols related to asthma? "Bioaerosol allergens can lead to negative health impacts in asthmatic patients" Reduce exposure via ventilation, moisture control, filtration.
www.sciencedirect.com/science/arti...
AJ and I contributed to this review led by @karencdannemiller.bsky.social.
www.sciencedirect.com/science/arti...
AJ and I contributed to this review led by @karencdannemiller.bsky.social.
March 18, 2025 at 4:58 PM
How are bioaerosols related to asthma? "Bioaerosol allergens can lead to negative health impacts in asthmatic patients" Reduce exposure via ventilation, moisture control, filtration.
www.sciencedirect.com/science/arti...
AJ and I contributed to this review led by @karencdannemiller.bsky.social.
www.sciencedirect.com/science/arti...
AJ and I contributed to this review led by @karencdannemiller.bsky.social.
Hantavirus disease is rare, more common in the western US, and has an estimated mortality rate of 35%, according to CDC data.
www.cdc.gov/hantavirus/d...
Here's a brief review about recent outbreaks: pmc.ncbi.nlm.nih.gov/articles/PMC...
www.cdc.gov/hantavirus/d...
Here's a brief review about recent outbreaks: pmc.ncbi.nlm.nih.gov/articles/PMC...
March 7, 2025 at 10:18 PM
Hantavirus disease is rare, more common in the western US, and has an estimated mortality rate of 35%, according to CDC data.
www.cdc.gov/hantavirus/d...
Here's a brief review about recent outbreaks: pmc.ncbi.nlm.nih.gov/articles/PMC...
www.cdc.gov/hantavirus/d...
Here's a brief review about recent outbreaks: pmc.ncbi.nlm.nih.gov/articles/PMC...
I've often wondered if hand dryers spread bioaerosols around. This study looked at two dryers. IF you still have bacteria on your hands, the dryers spread them around: 100 out of a billion by Xlerator, 500-1000 by Airblade.
www.tandfonline.com/doi/full/10....
/1
www.tandfonline.com/doi/full/10....
/1
March 7, 2025 at 7:44 PM
I've often wondered if hand dryers spread bioaerosols around. This study looked at two dryers. IF you still have bacteria on your hands, the dryers spread them around: 100 out of a billion by Xlerator, 500-1000 by Airblade.
www.tandfonline.com/doi/full/10....
/1
www.tandfonline.com/doi/full/10....
/1
Very interdisciplinary work that relied heavily on committee members Amy Pruden, Gabe Isaacman-VanWertz, Jactone Arogo Ogejo.
David is heading to postdoc with Jeff Siegel at U. Toronto on indoor air quality.
/2
David is heading to postdoc with Jeff Siegel at U. Toronto on indoor air quality.
/2
February 24, 2025 at 5:19 PM
Very interdisciplinary work that relied heavily on committee members Amy Pruden, Gabe Isaacman-VanWertz, Jactone Arogo Ogejo.
David is heading to postdoc with Jeff Siegel at U. Toronto on indoor air quality.
/2
David is heading to postdoc with Jeff Siegel at U. Toronto on indoor air quality.
/2
Congratulations to my PhD student David Kormos on successfully defending his dissertation!
Airborne Dissemination of Antibiotic Resistance Genes Near Farms and Effectiveness of Ionization Against Airborne Bacteria in a Classroom
pubs.rsc.org/en/content/a...
pubs.acs.org/doi/10.1021/...
+1 more
/1
Airborne Dissemination of Antibiotic Resistance Genes Near Farms and Effectiveness of Ionization Against Airborne Bacteria in a Classroom
pubs.rsc.org/en/content/a...
pubs.acs.org/doi/10.1021/...
+1 more
/1
February 24, 2025 at 5:19 PM
Congratulations to my PhD student David Kormos on successfully defending his dissertation!
Airborne Dissemination of Antibiotic Resistance Genes Near Farms and Effectiveness of Ionization Against Airborne Bacteria in a Classroom
pubs.rsc.org/en/content/a...
pubs.acs.org/doi/10.1021/...
+1 more
/1
Airborne Dissemination of Antibiotic Resistance Genes Near Farms and Effectiveness of Ionization Against Airborne Bacteria in a Classroom
pubs.rsc.org/en/content/a...
pubs.acs.org/doi/10.1021/...
+1 more
/1
If you have an evaporative cooler, you can attach HVAC filters to it to reduce indoor exposure to wildfire smoke. "Deep-bed impregnated carbon MERV 13 met particle removal and airflow goals."
February 20, 2025 at 3:14 PM
If you have an evaporative cooler, you can attach HVAC filters to it to reduce indoor exposure to wildfire smoke. "Deep-bed impregnated carbon MERV 13 met particle removal and airflow goals."
Federal research already focuses on chronic illnesses. A large majority of NIH research goes toward chronic diseases. By my count, only 13% goes to infectious diseases. The pandemic distorted our view of reality.
February 8, 2025 at 6:38 PM
Federal research already focuses on chronic illnesses. A large majority of NIH research goes toward chronic diseases. By my count, only 13% goes to infectious diseases. The pandemic distorted our view of reality.
Federal research already focuses on chronic illnesses. A large majority of NIH research goes toward chronic diseases. By my count, only 13% goes to infectious diseases. The pandemic distorted our view of reality.
February 8, 2025 at 6:36 PM
Federal research already focuses on chronic illnesses. A large majority of NIH research goes toward chronic diseases. By my count, only 13% goes to infectious diseases. The pandemic distorted our view of reality.
Flu is getting hot and heavy. CDC reports an upward trend in positive tests, we just detected a bunch of cases in child care centers in our MITIGATE FLU study, and my kid says "everyone" at high school is sick.
www.cdc.gov/fluview/surv...
www.cdc.gov/fluview/surv...
February 3, 2025 at 5:39 PM
Flu is getting hot and heavy. CDC reports an upward trend in positive tests, we just detected a bunch of cases in child care centers in our MITIGATE FLU study, and my kid says "everyone" at high school is sick.
www.cdc.gov/fluview/surv...
www.cdc.gov/fluview/surv...
"A statistically significant inverse relationship was observed between mid-class CO2 concentrations and COVID-19 incidence rates," but not when outliers were removed. Outliers are key, though, because these classrooms are most likely to see more transmission.
January 30, 2025 at 3:16 PM
"A statistically significant inverse relationship was observed between mid-class CO2 concentrations and COVID-19 incidence rates," but not when outliers were removed. Outliers are key, though, because these classrooms are most likely to see more transmission.
My postdoc Nishit Shetty (now at U Kansas) and I helped with aerosol inoculation for this paper on how influenza virus disperses within the respiratory tract of ferrets. Differences between intranasal and aerosol inoculation have implications for virus evolution.
www.pnas.org/doi/10.1073/...
www.pnas.org/doi/10.1073/...
January 21, 2025 at 5:51 PM
My postdoc Nishit Shetty (now at U Kansas) and I helped with aerosol inoculation for this paper on how influenza virus disperses within the respiratory tract of ferrets. Differences between intranasal and aerosol inoculation have implications for virus evolution.
www.pnas.org/doi/10.1073/...
www.pnas.org/doi/10.1073/...