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. 2022 Jun 6;241:113740. doi: 10.1016/j.ecoenv.2022.113740

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Fig. 2 — Odds ratios of positivity rate in (A) overall, (B) surface and (C) air samples at different Ct values of the latest viral test results of the patient. Note: Grey areas show 95 %CI of the ORs; red dashed line: OR = 1.0, Ct value 35 as reference).