True or False: Many new or emerging diseases threatening human health can be transmitted by vectors.

Many new or emerging diseases affecting human health are indeed transmitted by vectors, making the true statement the correct answer. Vectors, such as mosquitoes, ticks, and fleas, can carry pathogens that lead to diseases like Zika virus, West Nile virus, Lyme disease, and dengue fever. The dynamic nature of ecosystems, changing weather patterns, and human activities contribute to the spread of these diseases. Consequently, vector-borne diseases are on the rise, necessitating ongoing vigilance and vector control measures to protect public health.

The assertion that only some can be transmitted by vectors does not capture the broader context of vector-borne diseases that are emerging globally. Additionally, stating that only diseases in rural areas are vector-borne does not reflect the reality that many vectors thrive in urban settings as well, where they can effectively transmit diseases to a larger population. Hence, the widespread acknowledgment of the role of vectors warrants the conclusion that many new or emerging diseases can indeed be transmitted through these organisms.