Fig. 4. (a) FESEM micrograph of ZnO-NPs. (b) FESEM micrograph of ZnO-PEG-NPs. (c) TEM micrograph of ZnO-PEG-NPs. (d) Powder XRD results for ZnO-NPs. (e) Real-time PCR assay results for inhibition rates of four compounds against H1N1 influenza. (f) TGA results of ZnO-NPs. (g) TGA of ZnO-PEG-NPs. (h) Post-exposure antiviral activity of different compounds against H1N1 influenza virus assessed via TCID50 assay (reprinted with permission from ref. 30 Copyrights 2019 BioMed Central).