functional obsolescence. Impairment of the usefulness of a device or equipment due to a design defect, or due to its inability to be upgraded or modified to serve the user's current needs.efinition. Impairment of the usefulness of a device or equipment due to a design defect, or due to its inability to be upgraded or modified to serve the user's current needs. For example, a relatively new computer becomes functionally obsolete if it cannot run the latest program or peripheral the user wishes to use.
Current US DHHS guidelines (published April 8, 2015) state: 1  Antiretroviral therapy (ART) is recommended for all HIV-infected individuals to reduce the risk of disease progression. 2  ART also is recommended for HIV-infected individuals for the prevention of transmission of HIV.
Even when these HIV medications are effective, however, you can still transmit HIV to others. They are not a cure for HIV. The HIV drug Truvada, however, has been approved for use in those at high risk as a way to prevent HIV infection. used in conjunction with safe sex practices. A group of HIV specialists has developed guidelines for the use of these HIV medications.