Do you believe that the spread comes from people who don’t know their bodies?

I know anti virals only help so much. But really considering you know your prodrome symptoms, take anti virals and use protection and barely have had any outbreaks even when not on antivirals I think you would have such a low chance compared to someone With no symptoms or doesn’t know their status. What do you guys think? For people who have spread while taking precautions why do you think it happened besides viral shedding?