Research shows that wearing your mask, and opening the front passenger window, and the window behind the driver seat helps to reduce the spread of the novel coronavirus in your vehicle. See this NY Times article.
I have weird schedule because I work 12 hours in an emergency department. I usually work 3 days in a week, but picking up more days for overtime. Carpooling save us money, too. Whether I am the driver or passenger, being part of a carpool will save us money. I love carpooling because it also can reduce stress, also can meet new people.