Aims
This study evaluated the residual efficacy of commercially available antimicrobial coatings or films against severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) on non‐porous surfaces.
Methods and Results
Products were applied to stainless steel or ABS plastic coupons and dried overnight. Coupons were inoculated with SARS‐CoV‐2 in the presence of 5% soil load. Recovered infectious SARS‐CoV‐2 was quantified by TCID50 assay. Tested product efficacies ranged from <1.0 to >3.0 log10 reduction at a 2‐h contact time. The log10 reduction in recovered infectious SARS‐CoV‐2 ranged from 0.44 to 3 log10 reduction on stainless steel and 0.25 to >1.67 log10 on ABS plastic. The most effective products tested contained varying concentrations (0.5%–1.3%) of the same active ingredient: 3‐(trihydroxysilyl) propyldimethyloctadecyl ammonium chloride. Products formulated with other quaternary ammonium compounds were less effective against SARS‐CoV‐2 in this test.
Conclusions
The residual antimicrobial products tested showed varied effectiveness against SARS‐CoV‐2 as a function of product tested. Several products were identified as efficacious against SARS‐CoV‐2 on both stainless steel and ABS plastic surfaces under the conditions evaluated. Differences in observed efficacy may be due to variation in active ingredient formulation; efficacy is, therefore, difficult to predict based upon listed active ingredient and its concentration.
Significance and Impact
This study highlights the formulation‐specific efficacy of several products against SARS‐CoV‐2 and may inform future development of residual antiviral products for use on non‐porous surfaces. The identification of antimicrobial coatings or films showing promise to inactivate SARS‐CoV‐2 suggests that these products may be worth future testing and consideration.
As resegregation occurs across the country, some school districts are pursuing voluntary integration. This qualitative case study uses critical policy analysis to explore the political and social contexts surrounding the early stages of developing a voluntary integration plan in Wake County Public School System, North Carolina. Through analysis of interviews with school board and community members as well as a range of documents, findings indicate that population growth and residential development, the proliferation of unregulated school choice, varied perspectives of community stakeholders, inequitable distribution of power and resources, and school board politics largely shape the process of developing a voluntary integration plan. Recommendations are provided for school district policies, cross-sector collaboration, and state-level policies that could strengthen the potential success of voluntary integration plans.
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