A team of researchers has identified 25 USA counties that are most likely to experience measles outbreaks in 2019. The new law takes effect at the end of July.
During this time period, only one dose of the vaccine was required (the CDC's new requirement is everyone gets two doses of the vaccine) and it has been discovered that one of the vaccines that was commonly given actually does not work.
"We should be listening to science and medicine, not social media", Inslee said.
The best way to protect yourself and your children is to make sure you're immunized against measles. Some allow only religious exemptions, while others allow exemptions based on personal or philosophical beliefs. Because of the effectiveness of vaccines, measles is now so rare that most doctors have never seen a single measles case.
Parents opposed to the measures packed public hearings and the Washington state capitol regularly with their children throughout the legislative session, which ended April 28.
Washington Gov. Jay Inslee signed House Bill 1638 into law at Vancouver City Hall earlier this morning.
"As a teacher, yes I'm anxious because there are a lot of kids out there that don't have vaccines", said Louise Viverito, of Sarasota.
The epidemic will worsen, researchers warn, as more and more parents choose not to vaccinate their children.
Anyone who is unsure whether or not they are vaccinated can check with their primary care provider, Eisenhuth said.
"New Zealand eliminated endemic measles in 2012, meaning all cases of this highly infectious virus reported here since then have come from people bringing the disease in from overseas". Serious complications include brain swelling that can cause blindness or deafness and pneumonia.
Measles starts like a common cold, with runny nose, cough, red eyes and fever. Patients are contagious four days before and four days after getting the rash.
"We have observed an unprecedented upsurge in people sick with this preventable disease, and too many have lost their lives to it", said Dorit Nitzan, MD, acting regional emergency director at the WHO Regional Office for Europe. In fact, almost everyone in the United States got measles before there was a vaccine, and hundreds died from it each year. The study has since been discredited and the researcher lost his medical license, but misinformation and fear persists.
Several other states are considering similar legislation, including Maine, Connecticut and neighbouring OR, which saw a handful of cases tied to the Washington state outbreak.
Dr Bartone said the public health message to get vaccinated is still particularly relevant for those planning to travel to tourist hotspots in southeast Asia where Australians have been infected with measles.
Sarkar encouraged policymakers to focus on regions with lots of airline passengers traveling from affected countries, especially if there are even small local pockets of unvaccinated people already living in that county.
Outbreaks in the United States commonly occur in communities with lower vaccination rates, including the Amish and Ultra-Orthodox Jewish populations.