Cathy Lynn Zimmerman is a social scientist and professor at the London School of Hygiene and Tropical Medicine (LSHTM).

With a randomised control trial, they showed that by empowering and supporting women, and by giving them livelihood options, they more than halved their experiences of violence.

[citation needed] She found that these women were injured and in pain, with almost 60% experiencing PTSD when they entered post-trafficking services.

[citation needed] In an attempt to support the mental health of women who had been trafficked, Zimmerman worked with Amnesty International to provide more compassionate care to people in their "recovery period".

[11][12] Specifically, she created policies supporting people who had been trafficked, giving them up to 90 days to cooperate with criminal investigations.