https://twitter.com/JuliansRum/status/1211100162367664128?s=20
Remember hearing something about some kind of written exemption ..
This law does not change religious and medical exemption laws. Children who have one of these types of exemptions on file are not affected by the new law.
https://www.doh.wa.gov/CommunityandEnvironment/Schools/Immunization/ExemptionLawChange