Helper T cells (CD4+ T cells) are key coordinators of the adaptive immune response. They recognize antigens presented by MHC class II molecules on antigen-presenting cells. Upon activation, they secrete cytokines that help activate B cells to produce antibodies, help cytotoxic T cells, and enhance the microbicidal activity of macrophages.

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Zambia

• Joseph Soko – 101 pts

• Visual Pathway Lesions
• Positive and Negative Symptoms
• Hallucinations and Delusions
• Antipsychotic Medications
• Emergency: Environmental Emergencies