Participants received 2 grams per kilogram (g/kg) of GAMUNEX-C, which was capped to a maximum of 160 g infusion intravenously (IV) for participants weighing more than 80 kg on Day 1. The 2 g/kg net total dose was divided either into infusions of 500 mg/kg body weight over 4 days or 400 mg/kg body weight over 5 days as per investigator's decision. Participants received standard of care interventions as per Principal Investigator's discretion from Day 1 up to Day 29.

Participants received all standard of care interventions required as per Principal Investigator's discretion throughout the participant's hospitalization, from Day 1 to Day 29.

p-value was calculated using Fisher's exact method with 5% level of significance to test the null hypothesis of no difference in mortality rate between the two treatment groups.

Participants received 2 grams per kilogram (g/kg) of GAMUNEX-C, which was capped to a maximum of 160 g infusion intravenously (IV) for participants weighing more than 80 kg on Day 1. The 2 g/kg net total dose was divided either into infusions of 500 mg/kg body weight over 4 days or 400 mg/kg body weight over 5 days as per investigator's decision. Participants received standard of care interventions as per Principal Investigator's discretion from Day 1 up to Day 29.

Participants received all standard of care interventions required as per Principal Investigator's discretion throughout the participant's hospitalization, from Day 1 to Day 29.

Participants received 2 grams per kilogram (g/kg) of GAMUNEX-C, which was capped to a maximum of 160 g infusion intravenously (IV) for participants weighing more than 80 kg on Day 1. The 2 g/kg net total dose was divided either into infusions of 500 mg/kg body weight over 4 days or 400 mg/kg body weight over 5 days as per investigator's decision. Participants received standard of care interventions as per Principal Investigator's discretion from Day 1 up to Day 29.

Participants received all standard of care interventions required as per Principal Investigator's discretion throughout the participant's hospitalization, from Day 1 to Day 29.

Participants received 2 grams per kilogram (g/kg) of GAMUNEX-C, which was capped to a maximum of 160 g infusion intravenously (IV) for participants weighing more than 80 kg on Day 1. The 2 g/kg net total dose was divided either into infusions of 500 mg/kg body weight over 4 days or 400 mg/kg body weight over 5 days as per investigator's decision. Participants received standard of care interventions as per Principal Investigator's discretion from Day 1 up to Day 29.

Participants received all standard of care interventions required as per Principal Investigator's discretion throughout the participant's hospitalization, from Day 1 to Day 29.

Participants received 2 grams per kilogram (g/kg) of GAMUNEX-C, which was capped to a maximum of 160 g infusion intravenously (IV) for participants weighing more than 80 kg on Day 1. The 2 g/kg net total dose was divided either into infusions of 500 mg/kg body weight over 4 days or 400 mg/kg body weight over 5 days as per investigator's decision. Participants received standard of care interventions as per Principal Investigator's discretion from Day 1 up to Day 29.

Participants received all standard of care interventions required as per Principal Investigator's discretion throughout the participant's hospitalization, from Day 1 to Day 29.

Participants received 2 grams per kilogram (g/kg) of GAMUNEX-C, which was capped to a maximum of 160 g infusion intravenously (IV) for participants weighing more than 80 kg on Day 1. The 2 g/kg net total dose was divided either into infusions of 500 mg/kg body weight over 4 days or 400 mg/kg body weight over 5 days as per investigator's decision. Participants received standard of care interventions as per Principal Investigator's discretion from Day 1 up to Day 29.

Participants received 2 grams per kilogram (g/kg) of GAMUNEX-C, which was capped to a maximum of 160 g infusion intravenously (IV) for participants weighing more than 80 kg on Day 1. The 2 g/kg net total dose was divided either into infusions of 500 mg/kg body weight over 4 days or 400 mg/kg body weight over 5 days as per investigator's decision. Participants received standard of care interventions as per Principal Investigator's discretion from Day 1 up to Day 29.

Participants received all standard of care interventions required as per Principal Investigator's discretion throughout the participant's hospitalization, from Day 1 to Day 29.

Participants received 2 grams per kilogram (g/kg) of GAMUNEX-C, which was capped to a maximum of 160 g infusion intravenously (IV) for participants weighing more than 80 kg on Day 1. The 2 g/kg net total dose was divided either into infusions of 500 mg/kg body weight over 4 days or 400 mg/kg body weight over 5 days as per investigator's decision. Participants received standard of care interventions as per Principal Investigator's discretion from Day 1 up to Day 29.

Participants received all standard of care interventions required as per Principal Investigator's discretion throughout the participant's hospitalization, from Day 1 to Day 29.

Participants received 2 grams per kilogram (g/kg) of GAMUNEX-C, which was capped to a maximum of 160 g infusion intravenously (IV) for participants weighing more than 80 kg on Day 1. The 2 g/kg net total dose was divided either into infusions of 500 mg/kg body weight over 4 days or 400 mg/kg body weight over 5 days as per investigator's decision. Participants received standard of care interventions as per Principal Investigator's discretion from Day 1 up to Day 29.

Participants received all standard of care interventions required as per Principal Investigator's discretion throughout the participant's hospitalization, from Day 1 to Day 29.

Participants received 2 grams per kilogram (g/kg) of GAMUNEX-C, which was capped to a maximum of 160 g infusion intravenously (IV) for participants weighing more than 80 kg on Day 1. The 2 g/kg net total dose was divided either into infusions of 500 mg/kg body weight over 4 days or 400 mg/kg body weight over 5 days as per investigator's decision. Participants received standard of care interventions as per Principal Investigator's discretion from Day 1 up to Day 29.

Participants received 2 grams per kilogram (g/kg) of GAMUNEX-C, which was capped to a maximum of 160 g infusion intravenously (IV) for participants weighing more than 80 kg on Day 1. The 2 g/kg net total dose was divided either into infusions of 500 mg/kg body weight over 4 days or 400 mg/kg body weight over 5 days as per investigator's decision. Participants received standard of care interventions as per Principal Investigator's discretion from Day 1 up to Day 29.

Participants received all standard of care interventions required as per Principal Investigator's discretion throughout the participant's hospitalization, from Day 1 to Day 29.

Participants received 2 grams per kilogram (g/kg) of GAMUNEX-C, which was capped to a maximum of 160 g infusion intravenously (IV) for participants weighing more than 80 kg on Day 1. The 2 g/kg net total dose was divided either into infusions of 500 mg/kg body weight over 4 days or 400 mg/kg body weight over 5 days as per investigator's decision. Participants received standard of care interventions as per Principal Investigator's discretion from Day 1 up to Day 29.

Participants received 2 grams per kilogram (g/kg) of GAMUNEX-C, which was capped to a maximum of 160 g infusion intravenously (IV) for participants weighing more than 80 kg on Day 1. The 2 g/kg net total dose was divided either into infusions of 500 mg/kg body weight over 4 days or 400 mg/kg body weight over 5 days as per investigator's decision. Participants received standard of care interventions as per Principal Investigator's discretion from Day 1 up to Day 29.

Participants received all standard of care interventions required as per Principal Investigator's discretion throughout the participant's hospitalization, from Day 1 to Day 29.