- Infection that meets the following criteria: Any infection requiring hospital admission or requiring treatment with IV or IM antibiotics within 4 weeks prior to Visit 1 or during screening; any active infection that required treatment with oral antibiotics within 2 weeks prior to Visit 1 or during screening; upper or lower respiratory tract infection within 4 weeks prior to Visit 1 or during screening; active parasitic infection or Listeria monocytogenes infection within 6 months prior to Visit 1 or during screening