Newly diagnosed HIV-infected participants will be linked to care to start ART. Known HIV-positive participants will be linked to care if they are not in care already. All HIV-positive participants will undergo viral load and CD4 testing at screening/baseline, and be invited back every 6 months for assessment of adherence, viral load testing, STI testing, FBS and lipid profile. A CD4 count will be repeated at Month 12 and Month 24.

HIV-negative participants will be offered PrEP. Those who accept PrEP will enroll in the PrEP program in each country, undergo creatinine testing at screening/baseline and be invited back at Month 1, Month 3, and every three months thereafter for HIV testing and assessment of adherence. STI testing, FBS, creatinine and lipid profile will be repeated every 6 months.

HIV-negative participants who do not wish to start PrEP will be invited back at every three months for HIV-testing. STI-testing, FBS and lipid profile will be repeated every 6 months.

Longitudinally evaluate medical conditions in physiology by using self-administered questionnaires (e.g. sexual behavioral risk assessment) and laboratory results of anti-HIV over 24 months of follow-up.

Longitudinally evaluate the mental health as well as gender violence, stigma, discrimination, substance use, etc. by using self-administered questionnaires (e.g. mental health assessment, psychosocial assessment) including gender affirmation in primary care (e.g., hormones and/or surgical interventions history).

This is related to no.2 and will be collected by using the same questionnaires of self-administered. After collecting and grouping the data, we will know the structure and psychosocial problems that impact the health care system's access of transgender people.