Surfactant Protein-D: The Potential ARDS Biomarker And Its Role In COVID-19 Alexander Agustama, Anna Surgean Veterini*, Arie Utariani Abstract As of September 2021, the number of patients diagnosed with COVID-19 worldwide has exceeded 221 million; while the Case Fatality Rate in 215 countries and regions is 2.06%. Acute Respiratory Distress