Disruptive social events like the Covid-19 pandemic can have significant impact on the commercial sex industry, yet these effects have been little understood. This paper examines the effect of the pandemic on one part of the commercial sex industry: sex trafficking. Our results from scraped sexual service advertisements show that the pandemic has had measurable impact on online advertising for sex trafficking in the United States, with a significant decrease associated with stay-at-home orders followed by an increase to levels well above prepandemic levels as Covid-related restrictions were relaxed. We contribute to the policy landscape by showing that the initial decrease was associated with a loss of demand for sexual services due to pandemic-related health concerns, but that a confluence of factors, including the lack of economic and social support, increased the number of people vulnerable to being exploited. This study can assist policy makers in predicting future changes in the sex industry to support a more just and inclusive society. In the context of future health crises, natural disasters, and major social disruptions it can guide policy makers in apportioning public aid in a way that does not leave vulnerable populations and existing sex workers powerless to being trafficked.

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