CD40LG and COVID-19: From PBMCs collected 6 months after recovery from COVID‐19, percentages of four‐functional CD4 T cells which were induced by N, S1 and S2‐peptides to upregulate IFNγ, IL‐2, TNFα and CD154 were significantly increased compared to SARS‐CoV‐2 naïve‐CD4 T‐cell responses (Figure 1d, np < 0.0001, S1 p < 0.0001, S2 p < 0.0001), as well as compared to representative responses from the 3 months recovered individuals (Figure 1d, np < 0.0001, S1 p < 0.0001, S2 p < 0.0001).