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Open research questions in Animal Virus Infections Studies

146 unresolved questions extracted from the limitations and future-work sections of 304 Animal Virus Infections Studies papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • Limited effective vaccine strategies for PRRSV. No specific antiviral chemical drugs for PRRSV. Urgent need to develop effective antiviral agents to prevent and control PRRSV infection.

    A Soy-Derived Isoflavone Genistein Inhibits the Life Cycle of PRRSV In Vitro · 2026 · DOI

  • The absence of a stable in vitro viral culture system has hindered the development of commercial vaccines against duck circovirus. There is a lack of understanding of the genetic characteristics and prevalence of DuCV in Shandong Province, China.

    Epidemiological investigation and whole-genome genetic characterization of duck circovirus in Shandong Province of eastern China · 2026 · DOI

  • Mass-type vaccines fail to confer cross-protection against QX-like IBV. There is a need for a vaccine that can provide protection against emerging coronavirus variants. The current vaccines interfere with concurrently administered IBV vaccines.

    A recombinant Newcastle disease virus-vectored multi-epitope vaccine confers protection against QX-like infectious bronchitis virus in chickens · 2026 · DOI

  • Noroviruses are a leading cause of gastroenteritis worldwide, yet host factors that restrict norovirus replication are not well understood.

    Plscr1 inhibits murine norovirus entry · 2026 · DOI

  • However, their diversity, host associations and disease potential remain poorly understood.

    Disease investigation in a New Zealand high-health pig herd reveals a divergent porcine adenovirus · 2026 · DOI

  • However, the mechanisms by which PRRSV antagonizes host antiviral immune responses remain incompletely understood.

    PRRSV N protein antagonizes host antiviral immune responses by upregulating HSPA1B to induce autophagic degradation of Fos-related antigen 1 · 2026 · DOI

  • However, whether and how coronaviruses employ host iron regulatory pathways to remodel iron homeostasis remains unclear.

    PEDV envelope protein promotes viral replication by remodeling host iron homeostasis via the TRIM28-KLF15-FPN axis · 2026 · DOI

  • Other factors constraining genome size variations in nidoviruses remain poorly defined.

    Giant RNA genomes: Roles of host, translation elongation, genome architecture, and proteome in nidoviruses · 2025 · DOI

  • We hypothesize that the polyprotein length increase in nidoviruses may be limited by the host-inherent translation fidelity, ultimately setting a nidovirus genome size limit.

    Giant RNA genomes: Roles of host, translation elongation, genome architecture, and proteome in nidoviruses · 2025 · DOI

  • CIAV, recognized globally for decades, shows a significant genetic diversity, but its implications remain underexplored.

    Phylodynamic reconstruction of major chicken infectious anemia virus clades epidemiology, dispersal, and evolution · 2025 · DOI

  • Porcine reproductive and respiratory syndrome virus (PRRSV) poses widespread epidemics in swine herds, yet the drivers underlying lineage replacements/fitness dynamics remain unclear.

    Comparing the molecular evolution and recombination patterns of predominant PRRSV-2 lineages co-circulating in China · 2024 · DOI

  • Although GyVs are highly prevalent in various birds worldwide, their direct involvement in the etiology of specific diseases and the reasons for their ubiquity and host diversity are not fully understood.

    Gyrovirus: current status and challenge · 2024 · DOI

  • In recent years, the incidence of PRRSV-1 has been gradually increasing in China, but there are still few studies on it.

    Isolation and identification, genome-wide analysis and pathogenicity study of a novel PRRSV-1 in southern China · 2024 · DOI

  • However, whether the interaction between DDX21 and the PCV2 Cap regulates PCV2 replication remains unclear.

    DEAD-box RNA helicase 21 interacts with porcine circovirus type 2 Cap protein and facilitates viral replication · 2024 · DOI

  • Currently, the efficacy of vaccination for preventing and controlling PRRSV is insufficient.

    Virucidal effects of eucalyptus essential oil on porcine reproductive and respiratory syndrome virus · 2024 · DOI

  • It has been demonstrated in many investigations that the classic attenuated vaccine strain, PEDV CV777, is insufficient to fully protect against the PEDV variants.

    Porcine Epidemic Diarrhea Virus: Etiology, Epidemiology, Antigenicity, and Control Strategies in China · 2024 · DOI

  • A few studies have been conducted on the prevalence of PRCV since its first identification in 1997, but there have been no recent studies on the prevalence and genetic characterization of the virus in Korea.

    Prevalence and Genetic Characterization of Porcine Respiratory Coronavirus in Korean Pig Farms · 2024 · DOI

  • Current vaccine strategies for TGEV are limited by biosafety concerns or poor immunogenicity. There is a critical need for effective preventive strategies against TGEV.

    Development of a ferritin-based subunit nanoparticle vaccine targeting the S-RBD of porcine transmissible gastroenteritis virus · 2026 · DOI

  • The modular ferritin scaffold platform holds potential for rapid adaptation to other emerging veterinary coronaviruses such as PEDV and PDCoV, but this application remains to be explored.

    Development of a ferritin-based subunit nanoparticle vaccine targeting the S-RBD of porcine transmissible gastroenteritis virus · 2026 · DOI

  • The study does not mention any specific limitations. However, it can be inferred that the study may be limited by the small sample size (12 birds per group).

    Comparative Efficacy of Live Infectious Bronchitis Vaccines on Immune Response and Performance of Broiler Chickens · 2026 · DOI

  • Future research should investigate the long-term efficacy of the BH120 strain against IBV. Future studies should also explore the use of different vaccination routes and schedules.

    Comparative Efficacy of Live Infectious Bronchitis Vaccines on Immune Response and Performance of Broiler Chickens · 2026 · DOI

  • These findings support further exploration of spore-based microbial delivery systems as a potential mucosal immunisation adjuvant and immunomodulatory approach for PRRSV; however, the use of BALB/c mice represents a non-natural host model, and protective efficacy remains to be validated in target animals and challenge studies.

    Surface-displayed multivalent PRRSV tandem antigen on Bacillus subtilis spores induces mucosal immune responses in mice · 2026 · DOI

  • Coronaviruses exhibit high mutation rates during RNA virus replication, complicating vaccine development. The outbreak of the SARS-CoV-2 virus has highlighted the urgent need to study other members of the coronavirus family.

    FUT8-mediated core fucosylation of receptor APN drives entry of multiple alphacoronaviruses · 2026 · DOI

  • The study identifies a gap in understanding the interaction mechanisms between coronaviruses and their hosts. The study highlights the need to investigate the role of host factors in the replication process of SARS-CoV-2 and other CoVs.

    FUT8-mediated core fucosylation of receptor APN drives entry of multiple alphacoronaviruses · 2026 · DOI

  • The need for effective antiviral therapeutics against PEDV. The lack of understanding of the underlying mechanism of antiviral activity of quinazolinone alkaloids.

    Febrifugine dihydrochloride restricts porcine epidemic diarrhea virus replication by modulating the IGF1R-driven PI3K/AKT-apoptosis axis · 2026 · DOI

Most-cited papers in Animal Virus Infections Studies

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146 open questions have been extracted from the limitations and future-work passages of 304 Animal Virus Infections Studies papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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