Top Videos

IIT Professor Who Co-Signed Letter to WHO on Indoor Air Cleaners Reacts to New Guidance
0:00
0:00 / 5:47
Coronavirus

IIT Professor Who Co-Signed Letter to WHO on Indoor Air Cleaners Reacts to New Guidance

A professor of engineering at the Illinois Institute of Technology who helped write the rules on indoor air cleaners and joined hundreds of scientists who sent a letter to the World Health Organization urging them to pay more attention to aerosol transmission reacts to news that WHO released new guidance on the matter.

More Top Videos Videos

Slide 1 of 31
IIT Professor Who Co-Signed Letter to WHO on Indoor Air Cleaners Reacts to New Guidance
play videoplay video5:47
Now Playing

IIT Professor Who Co-Signed Letter to WHO on Indoor Air Cleaners Reacts to New Guidance

Phony labs charge thousands to Des Plaines couple's health insurance
play videoplay video4:21

Phony labs charge thousands to Des Plaines couple's health insurance

Concerns rise over economy after Jerome Powell remarks in Chicago
play videoplay video2:48

Concerns rise over economy after Jerome Powell remarks in Chicago

Vigil held for teen shot and killed weeks before graduation
play videoplay video2:13

Vigil held for teen shot and killed weeks before graduation

Cherry blossoms in bloom attract onlookers at Chicago's Jackson Park
play videoplay video2:11

Cherry blossoms in bloom attract onlookers at Chicago's Jackson Park

Loved ones of Chicago-area pilot killed in New York helicopter crash attend funeral
play videoplay video2:37

Loved ones of Chicago-area pilot killed in New York helicopter crash attend funeral

Good Samaritan saves woman after vehicle ends up in Naperville pond after crash
play videoplay video2:00

Good Samaritan saves woman after vehicle ends up in Naperville pond after crash

Samantha Steele discusses DUI arrest, political future
play videoplay video3:08

Samantha Steele discusses DUI arrest, political future

City, state officials express concerns over tariffs' potential impact on tourism
play videoplay video2:45

City, state officials express concerns over tariffs' potential impact on tourism

Chicago Department of Transportation to repave nearly 200 alleys
play videoplay video1:51

Chicago Department of Transportation to repave nearly 200 alleys

Chicago City Council weighing compromise on earlier teen curfew
play videoplay video2:52

Chicago City Council weighing compromise on earlier teen curfew

Suburban teen shot to death inside Bolingbrook home Tuesday, police say
play videoplay video1:09

Suburban teen shot to death inside Bolingbrook home Tuesday, police say

Medical student's AI invention for heart health up for national award
play videoplay video2:07

Medical student's AI invention for heart health up for national award

City Council set to debate earlier teen curfew after shootings during large gatherings
play videoplay video2:17

City Council set to debate earlier teen curfew after shootings during large gatherings

How cuts from DOGE are impacting DuPage Children's Museum
play videoplay video1:57

How cuts from DOGE are impacting DuPage Children's Museum

New exhibit debuts at Puerto Rican Arts Alliance
play videoplay video2:14

New exhibit debuts at Puerto Rican Arts Alliance

Biden visits Chicago in first post-presidency address
play videoplay video2:35

Biden visits Chicago in first post-presidency address

Church buys troubled Chatham store to transform community
play videoplay video1:56

Church buys troubled Chatham store to transform community

Flags flown at half-staff in Illinois in remembrance of fallen suburban soldier
play videoplay video3:47

Flags flown at half-staff in Illinois in remembrance of fallen suburban soldier

OIG report details gun crimes, other bad behavior by Chicago employees
play videoplay video2:29

OIG report details gun crimes, other bad behavior by Chicago employees

Chicago ‘teen takeover' response includes geofencing rideshares, officials say
play videoplay video1:33

Chicago ‘teen takeover' response includes geofencing rideshares, officials say

Wife of man mistakenly deported to El Salvador pleads for his safe return
play videoplay video2:48

Wife of man mistakenly deported to El Salvador pleads for his safe return

Air Force veteran, mother of 2 gifted car in giveaway to help families in need
play videoplay video2:18

Air Force veteran, mother of 2 gifted car in giveaway to help families in need

Mayor Johnson addresses ordinance for earlier curfew
play videoplay video3:14

Mayor Johnson addresses ordinance for earlier curfew

Wife of father mistakenly deported to El Salvador addresses media before hearing
play videoplay video3:55

Wife of father mistakenly deported to El Salvador addresses media before hearing

Mayor Johnson on meeting with Trump officials: ‘Not going to negotiate with terrorists'
play videoplay video4:25

Mayor Johnson on meeting with Trump officials: ‘Not going to negotiate with terrorists'

Chicago Fire welcomes back long-time chief Boden
play videoplay video0:48

Chicago Fire welcomes back long-time chief Boden

Northwestern University investigates antisemitic graffiti
play videoplay video2:03

Northwestern University investigates antisemitic graffiti

String of Wrigleyville robberies targets victims waiting for rideshare
play videoplay video2:07

String of Wrigleyville robberies targets victims waiting for rideshare

Tax Day 2025: Where to find deals and freebies in and around Chicago
play videoplay video0:40

Tax Day 2025: Where to find deals and freebies in and around Chicago

Portillo's begins new breakfast test at 5 locations. What you can get and where
play videoplay video0:55

Portillo's begins new breakfast test at 5 locations. What you can get and where

Latest

Cherry blossoms in bloom attract onlookers at Chicago's Jackson Park
play videoplay video2:11

Cherry blossoms in bloom attract onlookers at Chicago's Jackson Park

Loved ones of Chicago-area pilot killed in New York helicopter crash attend funeral
play videoplay video2:37

Loved ones of Chicago-area pilot killed in New York helicopter crash attend funeral

Samantha Steele discusses DUI arrest, political future
play videoplay video3:08

Samantha Steele discusses DUI arrest, political future

City, state officials express concerns over tariffs' potential impact on tourism
play videoplay video2:45

City, state officials express concerns over tariffs' potential impact on tourism

Suburban teen shot to death inside Bolingbrook home Tuesday, police say
play videoplay video1:09

Suburban teen shot to death inside Bolingbrook home Tuesday, police say

Chicago forecast: Chances for showers, storms grow in coming days
play videoplay video2:31

Chicago forecast: Chances for showers, storms grow in coming days

Wednesday morning forecast
play videoplay video2:49

Wednesday morning forecast

City Council set to debate earlier teen curfew after shootings during large gatherings
play videoplay video2:17

City Council set to debate earlier teen curfew after shootings during large gatherings

Kelly Clarkson surprises high school band director from viral TikTok
play videoplay video4:29

Kelly Clarkson surprises high school band director from viral TikTok

Church buys troubled Chatham store to transform community
play videoplay video1:56

Church buys troubled Chatham store to transform community

Chicago ‘teen takeover' response includes geofencing rideshares, officials say
play videoplay video1:33

Chicago ‘teen takeover' response includes geofencing rideshares, officials say

Wife of man mistakenly deported to El Salvador pleads for his safe return
play videoplay video2:48

Wife of man mistakenly deported to El Salvador pleads for his safe return

Dashboard
Newsletters Local Weather Weather Alerts School Closings Investigations NBC 5 Responds Submit a tip Entertainment Traffic Sports Chicago Baseball Chicago Bears Chicago Blackhawks Health U.S. & World Making A Difference Chicago Today The Takeaway
About NBC Chicago Our News Standards Submit a Consumer Complaint Submit Photos and Video Contests Newsletters TV Schedule Our Apps Cozi TV
Contact Us