The SMASH 2.0 Act reauthorizes and expands a federal program that funds surveillance and control efforts for mosquito-borne and other vector-borne diseases like Zika, West Nile virus, and dengue fever. The legislation authorizes $100 million annually from 2026 through 2030 for grants to states and localities to develop disease prevention plans and control programs, while allowing up to 5 percent of funds to support training and education for public health professionals. The bill encourages the use of innovative mosquito prevention technologies and requires the federal government to coordinate with the Strategic National Stockpile to prepare emergency supplies of vector control products. This reauthorization affects public health departments, state and local governments, and disease control agencies that work to reduce mosquito populations and prevent disease transmission in their communities.