* exist of other evidences that can explain pneumonia including but not limited to: influenza a virus, influenza b virus, bacterial pneumonia, fungal pneumonia, noninfectious causes, etc.; * allergy to intravenous immunoglobulin or its preparation components; * patients with selective iga deficiency * women who are pregnant or breast-feeding; * researchers consider unsuitable.

* exist of other evidences that can explain pneumonia including but not limited to: influenza a virus, influenza b virus, bacterial pneumonia, fungal pneumonia, noninfectious causes, etc.; * allergy to intravenous immunoglobulin or its preparation components; * patients with selective iga deficiency * women who are pregnant or breast-feeding; * researchers consider unsuitable.

- exist of other evidences that can explain pneumonia including but not limited to: influenza a virus, influenza b virus, bacterial pneumonia, fungal pneumonia, noninfectious causes, etc.; - allergy to intravenous immunoglobulin or its preparation components; - patients with selective iga deficiency - women who are pregnant or breast-feeding; - researchers consider unsuitable.

- exist of other evidences that can explain pneumonia including but not limited to: influenza a virus, influenza b virus, bacterial pneumonia, fungal pneumonia, noninfectious causes, etc.; - allergy to intravenous immunoglobulin or its preparation components; - patients with selective iga deficiency - women who are pregnant or breast-feeding; - researchers consider unsuitable.