Editorial: Research advances and challenges in emerging and re-emerging viral diseases

Emerging and re-emerging viral diseases continue to pose substantial challenges to public health, veterinary medicine, and global biosurveillance systems. The studies collected in this Research Topic highlight the breadth of current research efforts across virology, immunology, molecular diagnostics, and epidemiology. While spanning distinct pathogens and research methodologies, these contributions converge on common themes: the indispensable role of genomic surveillance, the need for improved vaccines and therapeutics, the importance of understanding host–virus interactions, and the persistent threat of zoonotic and vector-borne viruses.