Emerging and Re-Emerging Infectious Threats: Global Epidemiological Trends, Determinants, and Strategic Responses for Pandemic Preparedness

Emerging and re-emerging infectious diseases have become a major global public health concern, characterised by increasing frequency, rapid spread, and pandemic potential. These diseases arise from complex interactions among environmental changes, microbial evolution, globalisation, urbanisation, and human behavioural patterns. This cross-sectional analytical study investigates epidemiological patterns and determinants associated with emerging and re-emerging infectious diseases using 238 documented outbreak-related cases and surveillance reports. Environmental factors had the strongest association with disease emergence (F=7.12, p=0.001), followed by population density (F=6.48, p=0.002) and global travel (F=5.93, p=0.004). Environmental degradation, urban growth, increased human-animal interaction, and antimicrobial misuse significantly contribute to infectious disease emergence. The study highlights the critical importance of global surveillance systems, AI-powered early detection technologies, vaccination programmes, and coordinated international health policies in mitigating emerging infectious threats.