Fig. 5From: Expression of the SARS-CoV-2 receptor-binding domain by live attenuated influenza vaccine virus as a strategy for designing a bivalent vaccine against COVID-19 and influenzaReplication of experimental viruses in BALB/c mouse nasal turbinates (A) and lung tissue (B). BALB/c mice were immunized with experimental vaccine strains at a dose of 106 EID50 and tissues were collected on day 3 post immunization. Influenza viral titers were determined in eggsBack to article page