Is it really possible to leave sars-cov-2 outside the door?

Abstract Background In this historical period, it has become very important to live in healthy environments. By using everyday objects, cross-contamination is possible because of prolonged microbial persistence on surfaces. UV-C irradiation an environmentally friendly method disinfect objects as no harmful chemicals or heat are involved. This study aims determine the virucidal activity, against SARS-CoV-2, occurring a designed UV device, ‘Purity Capsule'. Methods An experimental was performed September 2020. The capsule’ 11 W lamp (3.5W UV-C) positioned centre device. dome covered with reflective, protective coating. Three metal carriers were placed at maximum distance from three different positions and tested 30 60 seconds 3 times. inoculated 100 µL SARS-CoV-2 viral suspension concentration 106.5 TCID50 /mL. After treatment, laboratory procedures used transfer treated virus multiwell plates. samples compared positive controls (not exposed light) after incubation, 37 °C 5% COÕ · humidified atmosphere, for days. residual activity by assessing 50% infectious dose per tissue culture (TCID50%). Results Tests show average reduction 4.0 Log10 (99.99%). All tests reached measurable log10 reduction: 5.0 (99.999%). Conclusions assessed effectiveness device significantly reducing load all regardless exposure time light source, impact level environmental pollution. Key messages • property inactivating growth; its physical approach considered good compromise between cost effectiveness. effective disinfecting small tested.