This disclosure describes systems and methods using blockchain for in-vehicle health and wellness tracking. An example method may include receiving a request for a vehicle from a mobile device of a user. The example method may also include receiving, from a pathogen detector device within a first vehicle, an indication that a number of pathogens within the first vehicle is less than a threshold amount. The example method may also include assigning the first vehicle to the user based on the indication that the number of pathogens within the first vehicle is less than a threshold amount.