All adult patients (\>18 years old) admitted with CAP and receiving a beta-lactam antibiotic plus a form of atypical coverage (azithromycin or doxycycline) in the ED within 12 hours of admission.
You may not be if
High clinical suspicion for Legionella pneumonia
Allergy or contraindication to the use of either azithromycin or doxycycline (usual clinical practice)
Antibiotics not for CAP
Pregnant women (based on clinical assessment as part of standard of care)
Severe CAP as defined by the ATS/IDSA criteria
Corrected QT prolongation (\> 450 ms in men and \> 460 ms in women)
