Decreased Frequencies of Circulating CD4⁺ T Follicular Helper Cells Associated with Diminished Plasma IL-21 in Active Pulmonary Tuberculosis

• Nathella Pavan Kumar,

  Affiliations National Institutes of Health–International Center for Excellence in Research, Chennai, India, National Institute for Research in Tuberculosis, Chennai, India

  ⨯
• Rathinam Sridhar,

  Affiliation Government Stanley Medical Hospital, Chennai, India

  ⨯
• Luke E. Hanna,

  Affiliation National Institute for Research in Tuberculosis, Chennai, India

  ⨯
• Vaithilingam V. Banurekha,

  Affiliation National Institute for Research in Tuberculosis, Chennai, India

  ⨯
• Thomas B. Nutman,

  Affiliation Laboratory of Parasitic Diseases, National Institutes of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America

  ⨯
• Subash Babu

  * E-mail: sbabu@mail.nih.gov

  Affiliations National Institutes of Health–International Center for Excellence in Research, Chennai, India, Laboratory of Parasitic Diseases, National Institutes of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America

  ⨯