Flow cytometry showed that the percentages of lung CD8+ Tem (CD8+CD44+CD62L-) and CD4+ Tem (CD4+CD44+CD62L-) were significantly increased after HF, while the percentages of lung naïve T cells (CD8+CD44-CD62L+ or CD4+CD44-CD62L+), which are characterized as high expression of CD62L and absence of activation marker CD44, were significantly reduced in HF mice (Supplementary Figures S1A–D). Here, CD4 is linked to hydrops fetalis.