Disability discrimination also occurs when a covered employer or other entity treats an applicant or employee less favorably because she has a history of a disability (such as cancer that is controlled or in remission) or because she is believed to have a physical or mental impairment that 
is not transitory (lasting or expected to last six months or less) and minor (even if she does not have such an impairment).
The law requires an employer to provide reasonable accommodation to an employee or job applicant with a disability, unless doing so would cause significant difficulty or expense for the employer (“undue hardship”).
The law also protects people from discrimination based on their relationship with a person with a disability (even if they do not themselves have a disability). For example, it is illegal to discriminate against an employee because her husband has a disability.
The U.S. Equal Employment Opportunity Commission (EEOC) today issued four revised documents on protection against disability discrimination, pursuant to the goal of the agency’s Strategic Plan to provide up-to-date guidance on the requirements of antidiscrimination laws.
The documents address how the Americans with Disabilities Act (ADA) applies to applicants and employees with cancer, diabetes, epilepsy, and intellectual disabilities. These documents are available on the agency’s website at “Disability Discrimination, The Question and Answer Series,” http://www.eeoc.gov/laws/types/disability.cfm.
“Nearly 34 million Americans have been diagnosed with cancer, diabetes, or epilepsy, and more than 2 million have an intellectual disability,” said EEOC Chair Jacqueline A. Berrien. “Many of them are looking for jobs or are already in the workplace. While there is a considerable amount of general information available about the ADA, the EEOC often is asked questions about how the ADA applies to these conditions.”
In plain, easy-to-understand language, the revised documents reflect the changes to the definition of disability made by the ADA Amendments Act (ADAAA) that make it easier to conclude that individuals with a wide range of impairments, including cancer, diabetes, epilepsy, and intellectual disabilities, are protected by the ADA. Each of the documents also answers questions about topics such as: when an employer may obtain medical information from applicants and employees; what types of reasonable accommodations individuals with these particular disabilities might need; how an employer should handle safety concerns; and what an employer should do to prevent and correct disability-based harassment.
For more:Â http://www.eeoc.gov/eeoc/newsroom/release/5-15-13.cfm
