From the article, "The US Centers for Disease Control and Prevention estimates that about one third of all antibiotic prescriptions in the US are unnecessary"

From the article, "The US Centers for Disease Control and Prevention estimates that about one third of all antibiotic prescriptions in the US are unnecessary" In another study, "The researches grouped the diagnostic codes into categories by whether they “always,” “sometimes,” or “never” merited antibiotics... Of those, 23.5% of these prescriptions were given for ailments in the “never” category"