A Phase II Safety and Efficacy Study on Prognosis of Moderate Pneumonia in Coronavirus Disease 2019 Patients With Regular Intravenous Immunoglobulin Therapy

J Infect Dis. 2021 May 20;223(9):1538-1543. doi: 10.1093/infdis/jiab098.


Background: Currently, there is no specific drug for the treatment of coronavirus disease 2019 (COVID-19). Therapeutic benefits of intravenous immunoglobulin (IVIG) have been demonstrated in wide range of diseases. The present study is conducted to evaluate the safety and efficacy of IVIG in the treatment of COVID-19 patients with moderate pneumonia.

Methods: An open-label, multicenter, comparative, randomized study was conducted on COVID-19 patients with moderate pneumonia. One hundred eligible patients were randomized in 1:1 ratio either to receive IVIG + standard of care (SOC) or SOC.

Results: Duration of hospital stay was significantly shorter in the IVIG group compared with that of SOC alone (7.7 vs 17.5 days). Duration for normalization of body temperature, oxygen saturation, and mechanical ventilation were significantly shorter in IVIG compared with SOC. Percentages of patients on mechanical ventilation in 2 groups were not significantly different (24% vs 38%). Median time to reverse-transcription polymerase chain reaction negativity was significantly shorter with IVIG than SOC (7 vs 18 days). There were only mild to moderate adverse events in both groups except for 1 patient (2%), who died in SOC.

Conclusions: Intravenous immunoglobulin was safe and efficacious as an adjuvant with other antiviral drugs in the treatment of COVID-19.

Keywords: COVID-19; IVIG; SARS-CoV-2; immunoglobulin; pneumonia.

Publication types

  • Clinical Trial, Phase II
  • Comparative Study
  • Multicenter Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Antiviral Agents / therapeutic use
  • COVID-19 / therapy*
  • Female
  • Humans
  • Immunoglobulins, Intravenous / therapeutic use*
  • Immunologic Factors / therapeutic use*
  • Male
  • Middle Aged
  • Pneumonia, Viral / therapy*
  • Prognosis
  • SARS-CoV-2*
  • Standard of Care
  • Treatment Outcome
  • Young Adult


  • Antiviral Agents
  • Immunoglobulins, Intravenous
  • Immunologic Factors