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 am a student from The Netherlands and will be doing an internship in Vila Real while living in Porto. Taking the bus is an option but carpooling once or twice a week will help me out a lot! On top of that, I love meeting new people, hearing their life stories and I am currently learning the Portuguese language so I hope to improve this during my stay in Portugal.