Ann: Natshield to be trialled by intelligent sterilisation robots, page-65

Aeroplanes would be a fantastic market for this product, you're right. Don't just sanitize the airport where people pass-by one another but also on the plane, where you've potentially had virus-carriers shedding onto surfaces for an hour upwards.

I don't know that a (continuous) ventilation system sanitizer is possible yet (see Washington Post article for what they're trialling) but perhaps we could provide a highly aerosolised version in cans, like what the flight attendants spray down the aisles on some international flights. It would at least sanitise the cabin, on deplaning, for future passengers.

Combine that with a safe, residual surface sanitiser for high-touch areas like bathrooms/handles and you're at least half-way to making people feel safe to fly, again.