This chapter of the manual provides a brief overview of the basic requirements of Title I of the ADA. Following chapters look at these and other requirements in more detail and illustrate how they apply to specific employment practices.
An employer may require that an individual not pose a "direct threat" to the health or safety of himself/herself or others. A health or safety risk can only be considered if it is "a significant risk of substantial harm." Employers cannot deny an employment opportunity merely because of a slightly increased risk. An assessment of "direct threat" must be strictly based on valid medical analyses and/or other objective evidence, and not on speculation. Like any qualification standard, this requirement must apply to all applicants and employees, not just to people with disabilities.
If an individual appears to pose a direct threat because of a disability, the employer must first try to eliminate or reduce the risk to an acceptable level with reasonable accommodation. If an effective accommodation cannot be found, the employer may refuse to hire an applicant or discharge an employee who poses a direct threat. (See Chapter IV .)