This makes sense to me because your husband was only around the sick person for the length of the ride, whereas I assume you spent extended periods of time around your husband when he was sick. This is a good example of how Covid germs can spread too, and why, although wearing masks primarily protects others, it can also potentially lessen the amount of viral load we would take in if we were around an infected person.
At least, that's my understanding. If I've got it wrong, anyone can correct me. We are *still* learning about Covid, so it's hard to keep up.
My daughter in northwestern New York state (where I'm moving in 2 days) just sent me a form to register for the vaccine there. Even though the estimated time for my group (65+) there is currently 14 weeks and it would be only 2 weeks here in Illinois, I'm relieved to be on a notification list. Maybe 14 weeks from now all the folks who have had their second shots (like my oldest daughter and her first-responder coworkers will have in Oregon) will have good recommendations for dealing with the side effects of the second shot -- although I'm guessing it will just be rest, water, and acetaminophen (or is it ibuprofen?).