CD27 and Huntington disease: In contrast the frequencies of CD45RA-CCR7+CD27+ central-memory (TCM), CD45RA-CCR7-CD27+ transitional-memory (TTM), and CD45RA-CCR7-CD27+ effector memory (TEM) T cells, CD57+ cytotoxic and CXCR5+ T follicular helper (Tfh) cells did not differ between ZIKV+, as compared to HD samples (S2B Fig).