The Centers for Disease Control and Prevention have pulled contentious school guidance off its website that advocated for students returning to in-person learning.

Originally published in July, the agency downplayed the transmission risks COVID-19 poised to children and others, emphasizing that closing schools would be detrimental to their social and emotional well-being and safety.

The document was removed because the information on COVID-19 transmission among children was outdated, Jason McDonald, a spokesperson for the CDC, said in a statement.

RELATED: Michigan shutters in-person dining, high school sports in response to COVID-19 case surge.

She cited findings in MEA’s recent survey of members that show more than 8-in-10 Michigan educators are concerned about the safety of in-person learning right now.

But last week’s safety steps by state and local health officials do not completely align with the CDC’s updated guidance on in-person learning.

Districts were not required to close buildings to K-8 in-person classes because the transmission risk was deemed lower.

The state’s guidance on COVID-19 has changed over time based on new knowledge about COVID-19, said Lynn Sutfin, Michigan Department of Health and Human Services spokeswoman.

15, MDHHS Director Robert Gordon said COVID-19 transmission rates vary between grade levels, with transmission more likely to happen at the high school level.

20, by the Kent County Health Department, Director Adam London said students in grades K-8 could continue with face-to-face learning even though high schools were ordered to close, calling younger students “less effective transmitters of coronavirus than high school students.”.