In June, National Nurses United accused the hospital of barring nurses from coming to work on days off to talk about the unionization effort, and from talking about union issues at work. Nurses said they have been pursuing a union to address safe staffing and working conditions, along with higher pay and benefits.
Johns Hopkins spokesman Kenneth Willis says the hospital disagrees with the NLRB's preliminary decision to move forward.
Other accusations against the hospital remain under investigation.
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