<p>We compared W3 cases to previously published results for W1 and W2 cases in Uganda and used the same methods and patient numbers as the previous study. We collected medical records for 200 PCR-confirmed hospitalized patients (HP) from Entebbe and Mulago Referral Hospitals during W3. We interviewed 200 randomly selected, PCR-confirmed non-hospitalized patients (NHPs) in W3 identified from lab records and interviewed them by phone. Data on demographics, clinical characteristics, and vaccination status were collected from patients or next-of-kin (for fatal cases).</p>