FCRL4 and dengue disease: Even though percentages of FcRL4+ B cells were low in naïve B cells of dengue positive patients, we did not evaluate other subsets of atypical B cells such as FcRL5+, CD11c+T-bet+, T-bethiCD85jhi, or CD21−/loCD27− B cells, which might affect our results (35, 36, 58, 59).