The survival rate of QG511-HA-Melittin in indicated cell lines. The cells were grown to confluent in 96-well plates and infected with QG511-HA-Melittin with a series of MOIs (MOI=0, 0.1, 0.5, 1, 2, 5, 10, 20, 50, and 100). The cell viability was determined after 96 h post infection. MTT method was used to assess the cytotoxicity. QG511-HA was used as the control. Compared with MOI=0 group, *P<0.05, **P<0.01.