CSF3 and viral infectious disease: A high proportion of lymphocytes (P=0.008, HR=0.04, 95%CI 0.00-0.42) and receiving G-CSF early (P=0.032, HR=0.10, 95%CI 0.01-0.82) were negative factors for viral infection after CAR-T therapy, or can be understood as protective factors for decreasing viral infection rate after CAR-T therapy.