CD4 ( + ) YFP ( + ) GFP ( + ) T cells generally exhibited a short-lived effector rather than effector memory T cell phenotype postinfection and expressed high levels of PD-1 , Lag-3 , and TIGIT , indicative of cellular exhaustion .
B-GeneOrGeneProduct O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B-GeneOrGeneProduct O B-GeneOrGeneProduct O O B-GeneOrGeneProduct O O O O O O