Patients with rheumatoid arthritis (RA) have an increased risk of infections; therefore. immunization against vaccine-preventable diseases is important. Methotrexate (MTX) impairs the antibody response to pneumococcal conjugate vaccine (PCV) in patients with arthritis. and the underlying mechanism is largely unknown. https://www.countryscenesaddleryandpetsuppliers.shop/product-category/browband/