In this photo taken Feb. 4, 2015 photo a vehicle in the High Occupancy Vehicle lane, on right, passes lines of slow moving cars on Southbound Highway 99 in Sacramento, Calif. Whether it's giving your neighbour a ride to the grocery store, or letting a friend borrow your car, health experts generally advise against sharing a vehicle during the COVID-19 pandemic.But like many coronavirus-related scenarios, determining the probability of infection from carpooling isn't so clear cut. THE CANADIAN PRESS/AP/Rich Pedroncelli