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Controversial director Michael Moore was hospitalized in the intensive care unit last week with severe pneumonia, brought on by high stress connected to the promotion of his latest movie Where to Invade Next and the multiple rallies he’s attended in support of Flint, Mich., his hometown.

Moore, 61, was admitted to New York Hospital on Jan. 31. After a week in the ICU, he’s now at home. On the night of his admission, he posted to social media that “things don’t look good.”

READ MORE: 4 questions about lead in Flint, Michigan’s water

The social activist posted a lengthy letter on Facebook and on his website, asking for fans and advocates to become “grassroots ambassadors,” promoting his new film however they can. Moore was forced to cancel planned appearances to promote his documentary, which hits theatres on Feb. 12.

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In the letter, he says he’s housebound and is having difficulty breathing normally.

Moore has been involved heavily in the ongoing Flint crisis, where the city’s water supply has been revealed to be contaminated with lead.

WATCH: Michael Moore “insists” Obama visit Flint

Flint’s tap water became contaminated after the city switched its water supply in 2014 to save money while under state financial management. Local officials first declared a public health emergency in October in response to tests that showed children with elevated levels of lead.

Moore has called for the arrest of local governor Rick Snyder, who was allegedly responsible for the water switch-over, and has engaged in multiple protests in Flint.

With files from The Associated Press

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