RIOK3 and infection: Since we detected a large increase of the RIOK3 X2 variant when sequencing fully processed mRNA-length RIOK3 isoforms, RT-qPCR with primers flanking the exon 8 was used to compare the levels of X2 alternative splicing events in cells infected with either MP-12 or rLuc RVFV particles at a multiplicity of infection (MOI) of 1 (MOIs were defined by the percentage of cells expressing the viral nucleocapsid protein in the first 24 h post infection as measured by flow cytometry).