A vaccine against pneumonia may not work as well in those with rheumatoid arthritis.
The 23-valent pneumococcal polysaccharide vaccine (PPSV23) may not be effective for preventing pneumonia in patients with rheumatoid arthritis (RA) who are at risk for infections, according to a study published in Arthritis Research & Therapy.
Kiyoski Migita, from the Japanese Hospital Organization and Department of Rheumatology at Fukushima Medical University, and colleagues conducted a double-blinded, randomized, placebo-controlled trial across rheumatology departments in Japanese National Hospital Organization hospitals. The study included 900 RA patients who had been treated with biological or immunosuppressive agents.
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