In addition, a significant positive correlation was detected between WBC count and transcript levels of TLR3 (rho = 0.55, P = 0.020), TLR7 (rho = 0.59, P = 0.029), TLR8 (rho = 0.44, P = 0.012), and TLR9 (rho = 0.41, P = 0.034) in the whole COVID-19 cases. Here, TLR9 is linked to COVID-19.