stigmatization of substance use may also deter help-seeking behaviors among PWID [8][9][10].Throughout the world, the COVID-19 pandemic affected every aspect of public health, including the delivery of HIV prevention services [11][12][13][14]. For example, lockdowns and social distancing practices increased risk for IDU-associated HIV transmission due to reductions in SSP utilization, sterile syringe coverage, and HIV testing [14][15][16][17][18]. Many SSPs were also short-staffed during the COVID-19 pandemic and experienced delays in funding and loss of funding opportunities [19]. A study conducted among PWID in New York (US) during COVID-19 also found higher levels of mental health issues, syringe reuse, and alcohol consumption, as well as reduced buprenorphine utilization, as compared to PWID sampled before the pandemic [15]. Recent analyses similarly found that the COVID-19 pandemic disrupted an increasing trend in preexposure prophylaxis (PrEP) prescriptions for HIV prevention in the US [20].Given that nearly 40% of new HIV infections are transmitted by persons unaware of their infection, routine HIV testing is vital to ensuring the public health of vulnerable populations [21].