You could be a carrier for months to years and be a vector without showing up positive in a test.
Just for the record, this is not correct. While it is true that there is an eclipse period during which testing is not useful (as indeed, there is an eclipse period for any viral infection), for HIV that window is currently very small.
- Centers for Disease Control and Prevention. Monitoring selected national HIV prevention and care objectives by using HIV surveillance dataâ"United States and 6 dependent areasâ"2011. HIV Surveillance Supplemental Report 2013;18(No. 5). http://www.cdc.gov/hiv/library/reports/ surveillance/. Published October 2013.
- Centers for Disease Control and Prevention and Association of Public Health Laboratories. Laboratory Testing for the Diagnosis of HIV Infection: Updated Recommendations. Available at http://stacks.cdc.gov/view/cdc/23447. Published June 27, 2014..