healthy volunteers inclusion criteria: * is male or non-pregnant female adult ≥ 18 and ≤ 55 years of age * has a body mass index (bmi) \< 35 kg/m2. * is healthy as determined by medical history and physical examination * agrees to use contraception through 3 months after the last dose of igm-6268

healthy volunteers inclusion criteria: * is male or non-pregnant female adult ≥ 18 and ≤ 55 years of age * has a body mass index (bmi) \< 35 kg/m2. * is healthy as determined by medical history and physical examination * agrees to use contraception through 3 months after the last dose of igm-6268

healthy volunteers inclusion criteria: is male or non-pregnant female adult ≥ 18 and ≤ 55 years of age has a body mass index (bmi) < 35 kg/m2. is healthy as determined by medical history and physical examination agrees to use contraception through 3 months after the last dose of igm-6268

healthy volunteers inclusion criteria: is male or non-pregnant female adult ≥ 18 and ≤ 55 years of age has a body mass index (bmi) < 35 kg/m2. is healthy as determined by medical history and physical examination agrees to use contraception through 3 months after the last dose of igm-6268