(WTTW News)

The more transmissible delta variant is expected to become the dominant coronavirus strain in the U.S., the director of the Centers for Disease Control and Prevention said. And with half the U.S. still not fully vaccinated, doctors say it could cause a resurgence of COVID-19 in the fall.

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Amid a steep decline in the number of confirmed COVID-19 cases and hospitalizations, Chicago officials will lift all restrictions on businesses and gatherings next Friday, Mayor Lori Lightfoot said. 

People wearing masks line up for a food drive in Brighton Park on Chicago’s Southwest Side on April 23, 2020. (WTTW News)

Some local doctors say scrapping mask mandates is premature, and increases the risk of COVID-19 for essential workers, many of whom are Latino.

In this Wednesday, Feb. 3, 2021, file photo, a passenger wears a face mask she travels on a flight from Hartsfield-Jackson International Airport in Atlanta. (AP Photo / Charlie Riedel, File)

Plus: Our Spotlight Politics team takes a look at mixed mask messaging on “Chicago Tonight”

The government’s new guidance on masks for vaccinated people has left some Americans confused and sent businesses and states scrambling to adjust their rules. 

(WTTW News)

Dr. Allison Arwady, commissioner of the Chicago Department of Public Health, talks about the city’s updated mask guidance and what’s now safe for people who are fully vaccinated against COVID-19.

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Chicago officials lifted the city’s mask mandate for fully vaccinated residents on Tuesday, but the city’s top doctor said she “strongly advises” businesses to require their employees and patrons to wear face coverings until the city fully reopens.

The CDC relaxes mask requirements for fully vaccinated people. But what about those who don’t want to give up masks? (WTTW News)

Gov. J.B. Pritzker on Monday lifted the state’s mask mandate for fully vaccinated residents. But not everyone is ready to follow the new guidance. We talk about the future of masks with Jocelyn Carter, director of clinical training at DePaul University.

People wearing masks line up for a food drive in Brighton Park on Chicago’s Southwest Side on April 23, 2020. (WTTW News)
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Following new CDC guidance, Gov. J.B. Pritzker lifted the state’s mask mandate for fully vaccinated residents on Monday. But Mayor Lori Lightfoot says she will continue to wear a mask, both indoors and outdoors, even though she is fully vaccinated. 

In this Tuesday, Dec. 8, 2020 file photo, Dr. Rochelle Walensky, speaks during an event in Wilmington, Del. (AP Photo / Susan Walsh, File)

The head of the Centers for Disease Control and Prevention on Sunday defended the decision to ease mask-wearing guidance for fully vaccinated people, stressing that increasing political pressure had nothing to do with the abrupt shift in guidelines.

FILE - In this May 13, 2021, file photo, although no longer required outside, a sign advises visitors to wear masks at the Denver Zoo in Denver. (AP Photo / David Zalubowski, File)
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More than a dozen states quickly embraced new federal guidelines that say fully vaccinated Americans no longer need to wear masks indoors or out in most cases. But other states and cities and some major businesses hesitated amid doubts about whether the approach is safe or even workable.

Runners enjoy Chicago’s lakefront trail. (WTTW News)
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Chicago and Illinois officials said Thursday they will follow new guidance from the Centers for Disease Control and Prevention and jettison rules that require fully vaccinated people to wear masks indoors. However, masks are not “going away,” according to city health officials.

(WTTW News)

Starting Friday, restaurants in suburban Cook County can serve up to 100 people indoors or no more than 50% capacity, according to officials.

Runners enjoy Chicago’s lakefront trail. (WTTW News)

U.S. health officials say fully vaccinated Americans don’t need to wear masks outdoors anymore unless they are in a big crowd of strangers, and those who are unvaccinated can go without a face covering outside in some cases, too.

Granby kindergarten school teacher Christina Kibby receives the Johnson & Johnson COVID-19 vaccine by pharmacist Madeline Acquilano, left, at Hartford Hospital in Hartford, Conn., Wednesday, March 3, 2021.(AP Photo / Jessica Hill)

Plus: Dr. Emily Landon talks new rules on ‘Chicago Tonight’

Fully vaccinated Americans can gather with other vaccinated people indoors without wearing a mask or social distancing, according to long-awaited guidance from federal health officials.

In this Feb. 19, 2021, file photo, people wait in line at a 24-hour, walk-up COVID-19 vaccination clinic hosted by the Black Doctors COVID-19 Consortium at Temple University’s Liacouras Center in Philadelphia. (AP Photo / Matt Rourke, File)

You’re fully vaccinated against the coronavirus — now what? Don’t expect to shed your mask and get back to normal activities right away. That’s going to be a disappointment, if not a shock, to many people. 

In this Nov. 25, 2020, file photo, air travelers line up to go through a a security checkpoint at Salt Lake City International Airport in Salt Lake City. (AP Photo / Rick Bowmer, File)

Travelers on airplanes and public transportation like buses and subways will be required to wear face masks starting next week to curb the spread of COVID-19.