Fig. 6From: Impacts of the COVID-19 pandemic on Chinese assisted reproductive technology institutions and human sperm banks: reflections in the post-pandemic eraPattern diagram of "three zones and five channels" biosafety protection system in IVF laboratory. "Three zones" including restricted (clean) zones, semi-restricted (semi-contaminated) zones, and unrestricted (contaminated) zones; “Five channels” including medical staff channel, patient channel, pollutant channel, sterilization material channel, and fire escape channelBack to article page