Clinical Trial for the Assessment of Delayed Antibiotic Treatment Strategies

General Inclusion Criteria: In this study can be enrolled adult patients with non-complicated acute respiratory tract infections, including pharyngitis and/or tonsillitis, rhinosinusitis, acute bronchitis and exacerbations of chronic obstructive pulmonary disease mild to moderate. The doctors include patients with these infections if they have reasonable doubts if the patients should treat with antibiotics General Exclusion Criteria: * Patients have participated in the PDA previously. * Patients are severely affected or patients has been felt severely affected for a week (all time) * Patients with symptoms and signs suggestive of serious illness or severely affected and/or complications (particularly pneumonia, mastoiditis, peritonsillar abscess, peritonsillar cellulitis, intraorbital or intracranial complications). * Patients at high risk of serious complications due to prior comorbidity. This includes significant heart disease, lung, kidney, liver or neuromuscular, immunosuppression, cystic fibrosis. * If the patient is over 65 years with acute cough and two or more of the following criteria or more than 80 years with acute cough and one or more of the following criteria: * Hospitalization in the previous year * Diabetes Type I or II * History of heart failure * Current use of oral corticosteroids.