Picture a healthcare worker at the end of a 12-hour shift in an infectious disease ward. They have been protected all shift. The PPE worked. They are at 99% safety. Now they must remove it.

Doffing, the removal sequence is precise, mandatory, and unforgiving. Outer gloves off first, rolled inward, never touching the outer surface with bare skin. Then gown, peeled front-to-back while folding contaminated surfaces inward. Then goggles, gripped only at the temples. Then mask, touched only at the straps, never the front face. Hand sanitization between every single step.

A controlled study at a tertiary care hospital tracked this exact process with fluorescent tracers and found that 100% of healthcare workers made at least one protocol deviation during doffing. Not some. All of them. And despite that, they were trained, experienced, and trying. This is not a training problem. Every solution tried so far like doffing assistants, protocol posters, video monitoring, spray chambers either puts more people in the contaminated zone or flags errors without preventing them. The problem is the irreducible gap between what the protocol demands and what humans can reliably do at the end of a gruelling shift.

DoffGuard is a walk-in robotic doffing station, roughly the footprint of a hospital shower cubicle that replaces the doffing room. The worker steps in, places their feet on the sensor platform, and initiates the sequence with a single foot pedal. No hands used. The system takes it from there.

A structured-light 3D scanner maps the worker's body geometry and PPE configuration in five seconds identifying glove cuffs, gown tie-points, mask strap positions, and zipper locations. No two workers or PPE configurations are identical; DoffGuard builds a session-specific removal plan from each scan.

Two articulated robotic arms with soft silicone force-limited grippers then execute the doffing sequence in the clinically correct order. Outer gloves are gripped at the wrist cuff and rolled inside-out and deposited directly into a sealed negative-pressure waste compartment. While the gown is removed, a 254-nanometre UV-C array illuminates the outer surface continuously, killing surface pathogens before the garment fully leaves the body. Masks are gripped from behind the head, avoiding any contact with the contaminated front face, and bagged in a sealed pouch before being lifted away. A 15-second quaternary ammonium mist then decontaminates the worker's remaining clothing and exposed skin.

The exit door does not unlock until the sensor confirms every step is complete and the mist cycle has finished. The entire process takes two to three minutes, faster than a manually-assisted doffing procedure and by mechanical design, impossible to deviate from.

All components are proven in other applications. Soft robotic grippers with force sensing are deployed in food handling and electronics assembly. Structured-light scanning is standard in industrial quality control. UV-C chambers are used in hundreds of hospitals today.

DoffGuard's innovation is combining them into a closed-loop doffing sequence that removes the human bottleneck from the single most dangerous moment in a healthcare worker's shift.