Exact(20)
Polivalent vaccines including multiple NoV genotypes and/or other viruses acquired by the enteric route have been developed.
Another essential question is how H9N2 viruses acquired the ability to replicate in mice.
By contrast, the 1957 H2N2 and 1968 H3N2 viruses acquired the surface protein(s) (H2 and N2 for H2N2; H3 for H3N2) and polymerase basic 1 (PB1) gene segments from avian strains [7].
Importantly, the origin of the pandemic H2N2 and H3N2 viruses has since been attributed to genetic reassortment events where circulating human influenza viruses acquired novel HA subtypes from avian influenza viruses [2], [3].
Interestingly, influenza A(H1N1 pdm09 and A(H3N2) viruses acquired non-overlapping sets of evolutionary markers.
In particular, A(H1N1 pdm09 viruses acquired PB1 segments from A(H3N2) viruses during 2013 (supplementary fig. S1).
Similar(40)
Discovered by scientists only a few years ago, CRISPRs are elements of an ancient system that protects bacteria and other single-celled organisms from viruses, acquiring immunity to them by incorporating genetic elements from the virus invaders.
Enveloped viruses acquire their envelope by budding from the host cell.
In some HIV-1-infected individuals, the viruses acquire the ability to use CXCR4 as a coreceptor.
Most enveloped viruses acquire their envelope by budding.
Neurotropic type viruses acquire neurovirulence and thus can cause progressive multifocal leukoencephalopathy (Fig. 4a).
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