Host jumps need not be common just because spillover is

Area of Science:

• * Epidemiology
• * Infectious Disease Dynamics
• * Pandemic Preparedness

Background:

• * Identifying pathogens with pandemic potential is crucial for global health security.
• * The concept of emergence risk is complex and debated among scientists.
• * Previous assumptions linked frequent pathogen spillover events to higher pandemic potential.

Purpose of the Study:

• * To investigate the relationship between pathogen spillover frequency and pandemic emergence risk.
• * To challenge the prevailing notion that frequent spillover directly correlates with increased emergence likelihood.
• * To provide a more nuanced understanding of factors contributing to pathogen emergence.

Main Methods:

• * Analysis of pathogen spillover data and historical emergence events.
• * Statistical modeling to assess correlation between spillover frequency and emergence.
• * Review of existing literature on zoonotic diseases and pandemic origins.

Main Results:

• * The study found no direct correlation between high spillover frequency and increased pandemic emergence risk.
• * Pathogens with less frequent but more severe spillover events may pose a greater threat.
• * Emergence is influenced by a complex interplay of factors beyond mere spillover frequency.

Conclusions:

• * Rethinking traditional metrics for pandemic risk assessment is necessary.
• * Focusing solely on spillover frequency may lead to underestimating certain pathogen threats.
• * A comprehensive approach considering pathogen characteristics and host factors is vital for accurate pandemic prediction.