Fig. 1. Influenza virus infection of 129Sv/Ev BMDMs. BMDMs cultured from femurs of female 129Sv/Ev mice were mock-infected or infected with A/WSN/33 and stained with antiserum to viral antigens. (a) Mock-infected cells, (b) 1 h p.i., m.o.i. 10, (c) 6 h p.i., m.o.i. 10 and (d) 48 h p.i., m.o.i. 10.