Using “Science” to Justify Not Wearing A Mask

I recently flew on United Airlines, and one of the passengers did not wear a mask for most of the 8-hour flight.

This action infuriated me, so naturally, I vented about it to a friend a few hours after landing. I lamented my fellow passenger’s callous disregard for human life, hardcore judging his lack of effort to protect the strangers around him. Apparently my friend did not share the same sentiments, and our conversation devolved into a long argument about the effectiveness of wearing a mask to reduce the transmission of Covid-19.