Lymphocyte activation occurs when lymphocytes (B cells or T cells) are triggered through antigen-specific receptors on their cell surface. This causes the cells to proliferate and differentiate ...

A peripheral-blood smear confirmed severe leukopenia with atypical lymphocytes, few but normal-appearing neutrophils, and no immature cells or schistocytes. The basic metabolic panel was normal.

Her work has previously appeared in Billboard, Forbes, and Reader's Digest. Getty Cases of atypical pneumonia (also known as “walking pneumonia") — which is a lung infection caused by the ...