LAUSR

Street protests are a common means of civic expression and occur across the globe. In the past few years, millions of citizens have attended street protests worldwide. Sometimes however, street protests can constitute significantly stressful and violent contexts. Research has highlighted the physical health impact of street protests due to clashes between protesters and law enforcement or use of CS gas [1]. In addition, police use of less-lethal weapons, such as rubber pellet launchers, is known to cause severe ocular injuries [2]. Besides these physical health effects, research has recently shifted focus on the mental health aspects of streets protests. For instance, the 2019 Hong-Kong anti-extradition bill protests is responsible for increased probable depression and suspected PTSD prevalence rates among the Hong-Kong population [3]. These mental health consequences were attributed to the stressful context of mass street protests as they happened in Hong-Kong (e.g. lootings). Yet, increased use of force by Hong Kong law enforcement in 2019 (e.g. 16,000 rounds of teargas fired vs. 87 in the Occupy Central protests of 2014 [4]), could partly explain the rise in probable PTSD and depression cases. Besides physical health consequences, the traumatic nature of police use of force may have lasting mental health consequences on citizens. Thus, police use of force may constitute a risk factor for public mental health, but the issue remains under-researched. In a recent study conducted among 523 Yellow Vests protesters in France, we assessed self-reported exposure to police violence-related traumas (yes/no items; physical abuse, rubber pellet ammunitions), to other protest-related traumas (e.g. physical injury, custody) as well as post-traumatic stress and depression symptoms [5]. Across analyses and despite adjustment on a range of potential confounds (demographics,