Health and infectious disease experts have identified several emerging viruses that pose the greatest risk of triggering global health crises this year [1].

These warnings highlight how human activity is altering the natural environment, making the global population more vulnerable to zoonotic spillover. As humans push further into wild ecosystems, the likelihood of encountering previously unknown pathogens increases.

Experts point to deforestation, climate change, and human expansion as the primary drivers behind these risks [3]. These factors force wildlife into closer contact with human settlements, creating opportunities for viruses to jump between species. This phenomenon is particularly acute in regions such as China and Mexico, as well as other ecosystems heavily impacted by land clearing [1], [4].

There is some variation among specialists regarding which specific pathogens present the most immediate threat. Some reports identify three viruses as the most concerning for 2026 [2], while other assessments list 10 emerging viruses of high concern [3].

Among the pathogens cited in various reports are avian flu and rabies [1]. Additionally, some experts have noted the increase of the human metapneumovirus (HMPV) in China, marking it as a significant point of concern for infectious disease specialists [4].

Preventing the next pandemic requires a coordinated global effort to monitor these high-risk zones. Experts said that the intersection of environmental degradation and urban sprawl creates a volatile environment for viral mutation. Without systemic changes to how humans interact with nature, the risk of a new outbreak remains high [3].

“Deforestation, climate change, and human expansion are the primary drivers behind these risks.”

The discrepancy in the number of high-risk viruses identified by different experts suggests that there is no single, unified list of threats. Instead, it reflects an evolving landscape of risk where regional spikes—such as HMPV in China—can shift global priorities. This underscores the necessity of a 'One Health' approach that integrates environmental conservation with public health surveillance to detect spillover events before they become pandemics.