You can get relevant information in document mentioned below:

Geibel, S., Gottert, A., Friedland, B. A., Jeremiah, K., McClair, T. L., Mallouris, C., Kentutsi, S., Hows, J., Sprague, L., Pulerwitz, J., & PLHIV Stigma Index 2.0 Study Group in Cambodia, the Dominican Republic, and Uganda (2020). Internalized stigma among people living with HIV: assessing the Internalized AIDS-Related Stigma Scale in four countries. AIDS (London, England), 34 Suppl 1, S33–S41. https://doi.org/10.1097/QAD.0000000000002649

If you want to test other people's attitudes towards people with HIV (a factor that causes stigma) you may benefit from our paper: