My thoughts and blessings go out you you and your daughter.
There is different acts put in place to protect your daughter and her job. There is the Family medical and leave act. It gives up to 12 weeks of unpaid leave.
to take medical leave when the employee is unable to work because of a serious health condition. ( taken right from the site)
U.S. Department of Labor - Find It By Topic - Leave Benefits - FMLA
There is also the ADA
ADA Home Page - ada.gov - Information and Technical Assistance on the Americans with Disabilities Act
Hope some of this can help good luck hugs to you both