The main object of the study is to compare the AUC0-84, of a single intravenous infusion of Vigam® Liquid (infused at the licensed rate of up to 3mL/min) with Gammaplex® (infused at up to 3mL/min and up to 6mL/min).

Inclusion Criteria:

• Healthy, normotensive, non-smoking male and female volunteers aged 18 to 60 who gave written informed consent and fulfilled all of the inclusion criteria and none of the exclusion criteria.
• Female volunteers of childbearing potential had a negative pregnancy test before entering the study and had to use either a double barrier method of contraception or use the oral contraceptive pill.
• Postmenopausal or surgically sterile female volunteers could be enrolled.

Exclusion Criteria:

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