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Three viruses that could trigger health crises in 2026
Viruses under watch
H5N1, mpox, and Oropouche have expanded or appeared in new settings and remain under international observation. Their trajectories differ, so each requires separate assessment rather than being treated as one unified pandemic threat.
Main risk signal
For H5N1, the key concern is adaptation that would enable sustained human-to-human spread. The cited report says that capability had not been established.
Regional outbreaks
Other diseases can still cause substantial regional harm without becoming global pandemics. Surveillance helps identify changes in geographic spread, severity, or transmission patterns before they become harder to contain.
How to interpret updates
The most useful indicators are confirmed clusters, sustained transmission, rising severity, and official assessments from public-health agencies. Headlines about potential risk should not be interpreted as confirmation of a pandemic.