The former industrial building at 2241 S. Halsted St. that has been converted into the city's largest shelter. (WTTW News)
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The acknowledgement that approximately 500 people returned to city shelters after living there for at least two months raises new questions about plans by officials to start evicting families with school-age children from city shelters on Monday.

(WTTW News)

The end of the outbreak comes after nearly six weeks, or two incubation periods, without any new measles cases, according to a news release. The last measles case was reported April 20.

(WTTW News)

Measles cases in Chicago account for more than half of reported cases in the U.S. so far this year. More than half of the measles cases in the city were in children ages 4 or younger.

Measles vaccine. (CNN)

The Chicago Department of Public Health says they are fighting the spread through testing and vaccinations — particularly in the Pilsen migrant shelter where the majority of cases are emerging.

The former industrial building at 2241 S. Halsted St. that has been converted into the city's largest shelter. (WTTW News)
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The measure set for a final vote by the full City Council on April 17 would require officials to detail how many people are evicted from city shelters every week. In addition, officials must report on the type and number of complaints filed by shelter residents twice per month, according to the proposal.

The former industrial building at 2241 S. Halsted St. that has been converted into the city's largest shelter. (WTTW News)
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In all, 31 Chicagoans have been diagnosed with measles since March 4.

The CDC is urging doctors to get patients vaccinated amid a global rise in measles cases. (Johannes Eisele / AFP / Getty Images via CNN)

The U.S. Centers for Disease Control and Prevention issued a health alert to doctors on Monday to increase awareness of the international spread of measles, and urged them to vaccinate infants a few months ahead of the typical schedule if families are planning to go abroad.

The former industrial building at 2241 S. Halsted St. that has been converted into the city's largest shelter. (WTTW News)
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City health officials did not immediately identify whether the latest people to contract measles are children or adults, nor did they disclose their condition, as they have with all other cases of measles.

The former industrial building at 2241 S. Halsted St. that has been converted into the city's largest shelter. (WTTW News)
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Since the first confirmed case of measles was diagnosed in a shelter resident on Friday, approximately 900 residents have been vaccinated, officials said. 

The former industrial building at 2241 S. Halsted St. that has been converted into the city's largest shelter. (WTTW News)
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A team from the Centers for Disease Control and Prevention is on its way to Chicago to assist the Chicago Department of Public Health respond to the apparent measles outbreak, Chicago health officials said.

The former industrial building at 2241 S. Halsted St. that has been converted into the city's largest shelter. (WTTW News)
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The child diagnosed with measles “has recovered and is no longer infectious,” according to the Chicago Department of Public Health.

(WTTW News)

Health officials said they are working to identify and notify people who may have been exposed to measles, including at the facilities where the resident sought medical care.

(WTTW News)

Local health officials are working to notify people who may have been exposed to measles after a northwest Indiana resident sought medical care last week in Chicago while contagious with the infection.

(WTTW News)

The measles case involves an unvaccinated individual and was confirmed by public health officials on Wednesday.

Three new cases of measles have been confirmed in Cook County, health officials announced Monday. That brings the statewide total to nine infected people. Seven of the cases, including six small children, have been linked to a Palatine day care center.

A confirmed case of measles is reported in suburban Cook County. We have the details on what you need to know about preventing an outbreak.