Herpes simplex: insights on pathogenesis and possible vaccines

Area of Science:

• Virology
• Immunology
• Epidemiology

Background:

• Herpes simplex viruses (HSV-1 and HSV-2) are ancient, ubiquitous viruses with increasing global prevalence.
• Despite antiviral use, HSV-2 pandemic continues, driven by viral latency and shedding.
• Mild symptoms in immunocompetent individuals mask significant knowledge gaps in disease severity and immune evasion.

Purpose of the Study:

• To highlight the challenges and knowledge gaps in understanding Herpes simplex virus (HSV) infection.
• To emphasize the need for research into host-pathogen interactions and immune evasion mechanisms.
• To underscore the importance of host genetics and immune responses in HSV disease expression.

Main Methods:

• Review of current understanding of HSV latency and shedding.
• Analysis of epidemiological trends in HSV-2 prevalence.
• Integration of findings from human genetic studies and imaging/biopsy research.

Main Results:

• HSV success is attributed to latency in neurons and frequent mucocutaneous shedding.
• Host-pathogen equilibrium generally leads to mild disease, but severity correlates are poorly understood.
• Human genetic and imaging studies reveal the importance of innate immunity and virus-host interplay in reactivation and disease.

Conclusions:

• Significant gaps in knowledge regarding HSV immune evasion and disease severity limit therapeutic advancements.
• Understanding host genetic factors and the spatio-temporal dynamics of immune responses is critical.
• Further research is needed to bridge knowledge gaps for effective control of HSV infections.