Vector-borne encephalitidies have replaced malaria as the major mosquito-borne disease in North America.

The statement that vector-borne encephalitidies have replaced malaria as the major mosquito-borne disease in North America is true. Encephalitidies, such as West Nile virus, Eastern equine encephalitis, and others, have become more prominent in the region, particularly due to climate changes, urbanization, and changes in land use that support mosquito breeding and the transmission of these viruses.

While malaria was once a significant health concern in parts of North America, particularly in earlier centuries, comprehensive public health measures, mosquito control programs, and improvements in sanitation and living conditions have drastically reduced its prevalence. In contrast, vector-borne encephalitidies have shown a resurgence, supported by the ability of mosquitoes to adapt and the increased interaction between humans, animals, and mosquito populations.

This shift illustrates a change in public health priorities and the need to address the evolving landscape of vector-borne diseases in North America today. Hence, the assertion is indeed correct.