The bill establishes a new section in chapter 70.54 RCW that emphasizes the importance of using scientifically proven measures to control the spread of communicable diseases. It asserts that public health responses should be guided by the best available science, particularly regarding immunizations and vaccines. Furthermore, it mandates that state and local health officials implement and promote evidence-based measures to combat communicable diseases, ensuring that no statutes, ordinances, rules, or policies can be enacted that would prohibit such actions. Any existing regulations that conflict with this new policy are declared null and void.

Additionally, the bill includes a declaration of emergency, stating that it is necessary for the immediate preservation of public peace, health, or safety, as well as the support of state government and its public institutions. This provision allows the act to take effect immediately upon passage.