From the Document: "Human trafficking occurs throughout the United States, and traffickers exploit vulnerable individuals for commercial sex and forced labor in a variety of legal and illegal industries. [...] under federal law there are certain protections from removal that are sometimes available to noncitizen victims of trafficking.  Noncitizen victims of trafficking are potentially eligible for the T nonimmigrant status, which protects them from removal and provides a path to permanent residency.  U nonimmigrant status is available to certain noncitizen victims of crime and may be available to trafficking victims who do not qualify for T status; the U status also provides a path to permanent residency.  Trafficking victims may be eligible for continued presence, which is not an immigration status but can offer protection from removal, among other benefits. This report provides a brief overview of human trafficking in the United States, discusses these three types of immigration relief available to trafficking victims, and presents relevant issues policymakers may consider regarding immigration protections available to these victims."
CRS Report for Congress, R46584
Congressional Research Service: https://crsreports.congress.gov/