Several factors contribute to the emergence of new health risks:
1. Globalization: Increased travel and trade can facilitate the rapid spread of pathogens across borders. 2. Climate Change: Changes in climate can alter the habitats of vectors like mosquitoes, potentially increasing the spread of vector-borne diseases such as dengue and Zika. 3. Urbanization: Dense population centers can amplify the transmission of infectious diseases. 4. Antimicrobial Resistance: Misuse and overuse of antibiotics can lead to the emergence of drug-resistant pathogens, complicating treatment efforts. 5. Zoonotic Diseases: Diseases that jump from animals to humans, such as avian influenza, pose significant risks due to their potential for rapid human-to-human transmission.