Virubustor AB is a start-up founded in response to Covid-19 to reduce airborne disease transmission onboard public transportation. Airborne transmission plays a disproportionately large role in the spread of respiratory diseases, as pathogens can reside in air for long periods and travel over great distances due to their small sizes. Infections of common colds, the flu and most respiratory diseases spread easily amongst passengers sharing a vehicle. We developed a solution for air purification in vehicle environments using the engine to continuously remove contagious aerosols inside the passenger compartment and at the same time decontaminate the displaced air without the inset of consumables. We are running a pilot project with a bus company in real-world operation in Uppsala and testing prototypes on ambulances with funding from a Vinnova.