Rheumatiod Factor- Serum Test for 1 parameters Rheumatoid Factor (Rapid) – Serum is a diagnostic blood test used to detect the presence of rheumatoid factor (RF) in the bloodstream. RF is an autoantibody produced by the immune system that targets healthy tissues, primarily in the joints. Serum No Fasting Required ₹660Free home sample Book Test Free home sample collection in 60 mins Reports within 3 Hours 10,00,000+Tests done TrustedDoctors 10,00,000+Certified Labs 10,00,000+Pickup-at-home Gallery-