The bill aims to enhance public health responses to communicable diseases in Washington State by ensuring that state and local health officials can utilize scientifically proven measures, including immunizations and vaccines, to control the spread of such diseases. It emphasizes the importance of providing the public with timely, evidence-based information to empower individuals to make informed health choices. The legislation explicitly states that it does not intend to modify or expand existing requirements for vaccinations or similar measures, nor does it grant new authority to impose such requirements.

Additionally, the bill establishes a new policy that mandates public health responses to be guided by the best available science regarding the safety and efficacy of measures to control communicable diseases. It prohibits the enactment of any statutes, ordinances, rules, or policies that would hinder the implementation and promotion of these evidence-based measures, declaring any existing conflicting regulations null and void. The act is deemed necessary for the immediate preservation of public health and safety, taking effect immediately upon passage.