Yes, Doctor Tany. If most sinus infections are viral, it makes little sense to treat every episode of thick, green mucus with antibiotics. Yet some patients request it and many doctors continue to prescribe them. It is likely that the improvement that follows antibiotic treatment would have happened regardless of the antibiotics; yet that very "sequence" of events tends to perpetuate the very idea that antibiotics are necessary! 🍂🌼🌾