SARS-CoV-2 Specific Monoclonal Antibody for Post-COVID-19 Conditions (Long COVID)

Acute COVID-19 infection can present differently among infected patients, with the infection ranging in symptom presentation from asymptomatic and mild symptomatology to severe illness. Common symptoms tied to a COVID-19 infection include fever, chills, cough, respiratory ailments (shortness of breath or difficulty breathing), fatigue, muscle and/or joint pain, headache, loss of taste or smell, sore throat, congestion, and/or gastrointestinal (GI) disturbances (nausea, vomiting, and/or diarrhea). In some patients, these symptoms are short-lived and span the length of the acute infection, while in many patients the symptoms can linger for an extended period. Early indications point to inflammation playing a key role in acute COVID-19 illness and severity, and may play a role in prolonged Long COVID(LC) symptom intolerance and long-term sequelae. Researchers have demonstrated the involvement of persistent inflammation, poor antiviral responses, and evidence of chronic viral reactivation. More recently, studies have demonstrated that mAb targeting the spike (S) protein of the SARS-CoV-2 may not only be effective in treating acute COVID-19 infection, especially variants prior to Omicron (alpha, beta, and delta), but also may play a role in addressing Long COVID. This implies that mAb infusions likely target SARS-CoV-2, decreasing activity, and potentially addressing disease pathogenesis tied to its activation, shutting down negative implications of inflammation tied to viral activation. This study will employ a two-arm randomized design to evaluate the efficacy of the drug Sipavibart in individuals experiencing LC symptoms. Participants will undergo six months of follow up after receiving either one dose of Sipavibart or one dose of placebo. After completion of the 6-month follow up, an open-label extension phase will be added at month 6 (week 24), where subjects who continue to experience symptoms of long COVID (regardless of the blinded treatment assignment) could be eligible to receive one dose of Sipavibart in an open-label fashion.