Vilobelimab

Injection: 200 mg/20 mL (10 mg/mL) clear to slightly opalescent, colorless solution in a single-dose vial.

No contraindications have been identified based on the limited available data for the emergency use of GOHIBIC under this EUA.

There are limited clinical data available for GOHIBIC. Serious and unexpected adverse events (AEs) may occur that have not been previously reported with GOHIBIC use.

5.1 Serious Infections Serious infections due to bacterial, fungal, and viral pathogens have been reported in patients with COVID-19 receiving GOHIBIC. In patients with COVID-19, monitor for signs and symptoms of new infections during and after treatment with GOHIBIC. There is limited information regarding the use of GOHIBIC in patients with COVID-19 and concomitant active serious infections. The risks and benefits of treatment with GOHIBIC in COVID-19 patients with other concurrent infections should be considered [see Adverse Reactions (6) ] .

5.2 Hypersensitivity Reactions Hypersensitivity reactions have been observed with GOHIBIC. If a severe hypersensitivity reaction occurs, administration of GOHIBIC should be discontinued and appropriate therapy initiated.

6.1 Clinical Trial Experience The following adverse reactions have been observed in the clinical studies of GOHIBIC that supported the EUA. The adverse reaction rates observed in these clinical studies cannot be directly compared to rates in the clinical studies of other products and may not reflect the rates observed in clinical practice. The safety of GOHIBIC is based on PANAMO, a Phase 3 randomized, placebo-controlled trial in COVID-19 patients requiring IMV or ECMO [see Clinical Studies (14) ] . The analysis of adverse reactions included a total of 364 adult patients who received at least one dose of either GOHIBIC (n=175) or placebo (n=189) plus standard of care. Patients received GOHIBIC 800 mg administered by intravenous infusion on Days 1, 2, 4, 8, 15 and 22 or placebo. During the study, there were 62 deaths in the GOHIBIC arm and 85 deaths in the placebo arm [see Clinical Studies (14) ] . Fatal infections occurred in more placebo patients. Nonfatal serious infections occurred in 58 patients (33.1%) in the GOHIBIC arm and in 55 patients (29.1%) in the placebo arm. The most commonly reported nonfatal serious infections with GOHIBIC were pneumonia (18.9% vs 13.8% in placebo), sepsis (14.9% versus 7.4% in placebo), and septic shock (9.1% versus 7.4% in placebo). Discontinuation of study treatment due to an adverse reaction occurred in 2.9% of the GOHIBIC group and 1.6% of the placebo group. Adverse reactions leading to discontinuation of GOHIBIC included eczema, bronchopulmonary aspergillosis, rash, hemodynamic instability, thrombocytopenia, and multi-organ failure. The most common adverse reactions occurring in at least 3% of GOHIBIC-treated patients and at least 1% more frequently than observed in the placebo arm are summarized in Table 1. Table 1. Adverse Reactions that Occurred in ≥3% of Patients Treated with GOHIBIC and at least 1% More Frequently than Observed in the Placebo Arm through Day 60 Adverse Reactions GOHIBIC + SoC (N=175) Placebo + SoC (N=189) n (%) n (%) SoC = standard of care. A patient is only listed once (regardless of event numbers) but one patient can be listed in different categories with one or additional reactions Pneumonia "Pneumonia" includes preferred terms containing the term "pneumonia"; does not include "COVID-19 pneumonia" 55 (31.4%) 44 (23.3%) Sepsis "Sepsis" includes preferred terms containing the term "sepsis". 38 (21.7%) 30 (15.9%) Delirium "Delirium includes the following preferred terms: Delirium, Intensive care unit delirium 22 (12.6%) 20 10.6%) Pulmonary embolism 19 (10.9%) 17 (9.0%) Hypertension 16 (9.1%) 13 (6.9%) Pneumothorax 14 (8.0%) 11 (5.8%) Deep vein thrombosis 11 (6.3%) 9 (4.8%) Herpes simplex 11 (6.3%) 5 (2.6%) Enterococcal infection 10 (5.7%) 8 (4.2%) Bronchopulmonary aspergillosis 10 (5.7%) 7 (3.7%) Hepatic enzyme increased 9 (5.1%) 7 (3.7%) Urinary tract infection 9 (5.1%) 6 (3.2%) Hypoxia 8 (4.6%) 6 (3.2%) Thrombocytopenia 8 (4.6%) 2 (1.1%) Pneumomediastinum 8 (4.6%) 0 (0.0%) Respiratory tract infection 7 (4.0%) 5 (2.6%) Supraventricular tachycardia 7 (4.0%) 1 (0.5%) Constipation 6 (3.4%) 3 (1.6%) Rash 6 (3.4%) 0 (0.0%)

6.3 Required Reporting for Serious Adverse Events and Medication Errors The prescribing healthcare provider and/or the provider's designee is/are responsible for mandatory reporting of all serious adverse events (SAEs) SAEs are defined as: Death;A life-threatening AE;Inpatient hospitalization or prolongation of existing hospitalization;A persistent or significant incapacity or substantial disruption of the ability to conduct normal life functions;A congenital anomaly/birth defect;Other important medical event, which may require a medical or surgical intervention to prevent death, a life-threatening event, hospitalization, disability, or congenital anomaly and medication errors potentially related to GOHIBIC within 7 calendar days from the healthcare provider's awareness of the event, using FDA Form 3500 (for information on how to access this form, see below). The FDA requires that such reports, using FDA Form 3500, include the following: Patient demographics and baseline characteristics (e.g., patient identifier, age or date of birth, gender, weight, ethnicity, and race) A statement "GOHIBIC use for COVID-19 under Emergency Use Authorization (EUA)" under the " Describe Event, Problem, or Product Use/Medication Error " heading Information about the SAE or medication error ( e.g ., signs and symptoms, test/laboratory data, complications, timing of drug initiation in relation to the occurrence of the event, duration of the event, treatments required to mitigate the event, evidence of event improvement/disappearance after stopping or reducing the dosage, evidence of event reappearance after reintroduction, clinical outcomes). Patient's preexisting medical conditions and use of concomitant products Information about the product ( e.g ., dosage, route of administration, NDC #). Submit AE and medication error reports, using Form 3500, to FDA MedWatch using one of the following methods: Complete and submit the report online: www.fda.gov/medwatch/report.htm Complete and submit a postage-paid FDA Form 3500 (https://www.fda.gov/media/76299/download) and return by: Mail to MedWatch, 5600 Fishers Lane, Rockville, MD 20852-9787, or Fax to 1-800-FDA-0178, or Call 1-800-FDA-1088 to request a reporting form In addition, please provide a copy of all FDA MedWatch forms to: InflaRx GmbH Fax: 1-866-728-2630 E-mail: pvusa@inflarx.de Or call InflaRx GmbH at 1-888-254-0602 to report AEs. The prescribing healthcare provider and/or the provider's designee is/are responsible for mandatory responses to requests from FDA for information about AEs and medication errors following receipt of GOHIBIC.

No drug interaction studies have been conducted with GOHIBIC.

8.1 Pregnancy Risk Summary There are no available data on GOHIBIC use in pregnant women to evaluate for a drug-associated risk of major birth defects, miscarriage or other adverse maternal or fetal outcomes. Placental transfer of monoclonal antibodies such as GOHIBIC is greater during the third trimester of pregnancy; therefore, potential effects on a fetus are likely to be greater during the third trimester of pregnancy. In an enhanced pre- and post-natal (ePPND) study conducted in cynomolgus monkeys, placental transport of GOHIBIC was observed but there was no evidence of fetal harm following intravenous administration of GOHIBIC throughout pregnancy at doses 2.5 times the maximum recommended human dose (MRHD) of 800 mg on a mg/kg basis (see Data ) . The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk for major birth defects and miscarriage in clinical recognized pregnancies is 2% – 4% and 15% – 20%, respectively. Data Animal Data In the ePPND study, pregnant cynomolgus monkeys received GOHIBIC from GD20 to GD22 (dependent on pregnancy determination), at the beginning of organogenesis, and once every 7 days until the end of gestation at intravenous doses up to 50.6 mg/kg/wk (2.5 times the MRHD on a mg/kg basis). There were no GOHIBIC-related adverse effects on maternal health, pregnancy outcome, embryo-fetal development, or neonatal growth and development up to 6 months of age (PND183). GOHIBIC crossed the placenta in cynomolgus monkeys and GOHIBIC plasma concentrations were similar in infants relative to maternal animals on PND28 and were 8-12 times higher in infants relative to maternal animals on PND91. GOHIBIC was not detected in infant plasma on PND183.

8.2 Lactation Risk Summary There are no available data on the presence of GOHIBIC in either human or animal milk, the effects on the breastfed infant, or the effects on milk production. Maternal IgG is known to be present in human milk. The effects of local gastrointestinal exposure and limited systemic exposure in the breastfed infant to GOHIBIC are unknown. The lack of clinical data during lactation precludes clear determination of the risk of GOHIBIC to an infant during lactation. Therefore, the developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for GOHIBIC and any potential adverse effects on the breastfed child from GOHIBIC or from the underlying maternal condition.

8.3 Pediatric Use GOHIBIC is not authorized or approved for the emergency use in pediatric patients for the treatment of coronavirus disease 2019 (COVID-19) in hospitalized patients when initiated within 48 hours of receiving invasive mechanical ventilation (IMV), or extracorporeal membrane oxygenation (ECMO).

8.4 Geriatric Use Of the total number of GOHIBIC-treated patients in clinical studies for COVID-19 receiving invasive mechanical ventilation (IMV), or extracorporeal membrane oxygenation (ECMO), 53 (30%) were >65 years. No overall differences in effectiveness or safety of GOHIBIC have been observed between patients 65 years of age and older and younger adult patients.

GOHIBIC is a chimeric monoclonal IgG4-kappa antibody that binds to C5a with a dissociation constant of 9.6pM and blocks its interaction with the C5a receptor. C5a is part of the complement system and is activated as part of the innate immune response initiating an inflammatory cascade that includes increased vascular permeability, coagulation, proinflammatory cytokine release, and recruitment and activation of neutrophils and other myeloid cells.