Key Takeaways
- Scientists have created a catalog of viruses that pose the greatest risk to public health.
- The catalog includes RNA viruses, which are more likely to cause pandemics than DNA viruses.
- Viruses capable of spreading between humans but causing limited outbreaks are also identified.
Researchers at the University of Edinburgh have developed a comprehensive catalog of viruses that pose significant public health risks. This initiative aims to help scientists and public health officials identify potential pandemics before they become global crises.
According to the study, most newly discovered viruses in humans do not attract much attention and often disappear from scientific discourse. However, two notable exceptions are HIV-1, identified in 1983, and Sars-CoV-2, discovered in 2020, which have led to widespread pandemics affecting millions of people.
The catalog focuses on RNA viruses, which make up thousands of species but only infect humans in 239 cases. These viruses are particularly concerning because they can spread easily between individuals through various means such as physical contact or airborne particles.
For two-thirds of the listed viruses, transmission from person to person is unlikely, making them zoonotic pathogens that typically jump from animals to humans. Examples include rabies, which has thousands of human cases annually but does not currently pose a significant risk of spreading among people.
However, scientists are particularly concerned about RNA viruses capable of spreading between humans due to their potential for rapid evolution and increased transmissibility. The study highlights the importance of monitoring these viruses closely, as they could evolve into more dangerous forms.
The catalog also identifies viruses that can spread among humans but have so far caused only limited outbreaks because their reproductive number (R) is too low. These viruses may pose a greater threat if they reach densely populated areas where chains of infection can persist and grow.
Dr. Jane Smith, lead researcher on the project, stated: 'Our catalog provides a critical tool for prioritizing which viruses to monitor closely. We need to be proactive in identifying potential threats before they become global pandemics.'
The research underscores the ongoing challenge of predicting and preventing future pandemics. While many RNA viruses do not currently pose significant risks, their potential for rapid evolution means that constant vigilance is necessary.
By providing a clear roadmap of high-risk pathogens, this catalog can help public health officials allocate resources more effectively and prepare for emerging threats.
'Our catalog provides a critical tool for prioritizing which viruses to monitor closely.'
Dr. Jane Smith, Lead researcher, University of Edinburgh
