The meaning of the quote "Without feeling of respect, what is there to distinguish men from beast" is a saying that humans have a certain level of consciousness that separates us from any other creature. We he created this type of society where we are expected to uphold certain standards, unlike our more primitive counterparts.
People who never develop symptoms or are not yet showing symptoms (pre-symptomatic) might not know that they are infected but can still spread rona to others. Masks also offer protection to the wearer.
