Rituxan (rituximab) - Roche
Paxlovid (nirmatrelvir/ritonavir) - Pfizer
Diagnostic Pitfall: Prolonged COVID-19 Presenting as Organising Pneumonia in a Rituximab-Treated Patient with Rheumatoid Arthritis. (PubMed, Mediterr J Rheumatol) - Sep 19, 2026 - "Rituximab (RTX)-induced B-cell depletion is associated with prolonged SARS-CoV-2 infection. Retreatment with a second 5-day course of nirmatrelvir/ritonavir led to rapid clinical improvement and complete radiological resolution. Persistent SARS-CoV-2 infection should be considered in RTX-treated patients with non-resolving pulmonary infiltrates, particularly when corticosteroid therapy is ineffective." 
Journal • Gastrointestinal Disorder • Immunology • Infectious Disease • Inflammation • Inflammatory Arthritis • Novel Coronavirus Disease • Pneumonia • Respiratory Diseases • Rheumatoid Arthritis • Rheumatology
http://www.ncbi.nlm.nih.gov/pubmed/42756418
 
Alexios Iliopoulos; Antigoni Soufla; George E Fragoulis
 
Sep 19, 2026
 
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