ALB and infection: The virus stock solution was adjusted to the desired multiplicity of infection (MOI) in phosphate-buffered saline (PBS) supplemented with 0.2% bovine serum albumin (BSA), 1 mM MgCl2, 0.9 mM CaCl2, 100 U/mL penicillin and 0.1 mg/mL streptomycin.