Myths have potentially contributed to more than 900 measles cases reported across the country. Public health officials are working to combat misinformation surrounding vaccines in an effort to curb the spread.
by Judith Ruiz-Branch Illinois News Connection
CHICAGO - At least two people have tested positive for measles in Illinois and public health officials are working to combat misinformation surrounding vaccines in an effort to curb the spread.
Health officials said the measles virus is highly infectious and especially concerning for babies and young children, as well as people who are pregnant or have compromised immune systems. It can cause pneumonia, brain damage and even be fatal in some cases.
Dr. Kiran Joshi, interim chief operating officer at the Cook County Department of Public Health, said it is also preventable through vaccination, with two doses of measles-mumps-rubella vaccine providing nearly 100% lifelong protection.
"Ninety-seven percent of people who got measles this year happened to be unvaccinated," Joshi pointed out. "Vaccination is incredibly protective."
Joshi added over the past 50 years, the measles vaccine has saved more than 150 million lives across the world. He noted the department has launched a campaign to counter some of the misinformation that is circulating.
Public health officials are focusing campaign efforts on unvaccinated people. Joshi explained it includes having multiple conversations with hesitant patients and providing evidence-backed information. He stressed misinformation about preventive measures like taking vitamin A is concerning and not scientifically proven.
"There are a lot of myths out there, such as 'vaccines can cause autism,'" Joshi pointed out. "I want to state categorically that is incorrect, that there's no credible evidence to support that, yet these myths continue to perpetuate."
Joshi added the myths have potentially contributed to more than 900 measles cases reported across the country.
"When you look at the research, when you look at the evidence, all of that has been subjected to pretty rigorous standards," Joshi outlined. "We also go to the nature of science, that you have to be able to repeat studies. You have to look at the research as a whole, instead of sort of cherry-picking."
He advised anyone with questions to speak with their primary care provider about their vaccine records and ensure they are getting any health information from reputable source.
PEORIA - As measles cases continue to climb across the United States, the long-term implications can’t be ignored.
The respiratory viral infection, although thought eliminated in the U.S. in 2000, has reemerged, especially among unvaccinated individuals. As of early April 2025, the Centers for Disease Control and Prevention (CDC) has reported more than 600 confirmed cases of measles.
Measles is extremely contagious
"The key to measles is how highly infectious it is. Each person that has measles will infect between 12 and 18 people in an unvaccinated situation," says Doug Kasper, MD, an infectious disease specialist with OSF HealthCare. "The key for controlling measles is widespread vaccine use."
For reference, each influenza patient, on average, will infect one to two others.
The measles vaccine is normally offered once a child has reached one year of age. It's a two-shot series, which came on the market in 1963. Dr. Kasper says this gives medical experts decades of data that show a correlation between people receiving the vaccine, and close to zero circulation of the virus in the United States.
The states with measles outbreaks are in unvaccinated people, and no breakthrough cases (in those who have received the vaccine) have been reported, Dr. Kasper adds.
The long-term risks for unvaccinated measles patients
"There is emerging information that vaccination not only protects an individual from not becoming ill or having less severity of illness with a viral exposure, whether that's measles, chicken pox, influenza or COVID-19, but that there are long-term risks from viral infections that we do not appreciate in the moment," Dr. Kasper says. "Some of these have been associated with memory loss or dementia as somebody ages. Some of these are associated with organ disease like hepatitis or kidney disease."
Subacute Sclerosing Panencephalitis (SSPE)
SSPE is a rare, deadly degenerative disease of the central nervous system that can happen seven to 10 years after a measles infection. Young children, pregnant women and immunocompromised people are the most at-risk for SSPE. One to three out of every 1,000 children who become infected with measles will die from respiratory and neurologic complications, the CDC says.
SSPE symptoms happen over four stages.
Stage 1: Personality changes, mood swings or depression. There may also be fever and headaches, this stage can last up to six months
Stage 2: Muscle spasms and uncontrolled movement problems. Loss of vision, dementia and seizures can occur
Stage 3: Twisting movements and rigidity. Sometimes death
Stage 4: Serious brain damage, including areas of the brain that control breathing, heart rate and blood pressure, leading to coma and death
Immune amnesia
Another long-term impact of measles is known as immune amnesia. The American Society for Microbiology (ASM) calls immune amnesia “one of the most unique and most dangerous features of measles pathogenesis.” The extremely rare condition causes people’s immune systems to “forget” how to fight off infections and makes the person more susceptible. The ASM determined it normally takes two to three years after a measles infection for protective immunity to return.
A measles outbreak was declared in Northeast Illinois in early 2024 and declared “over” by the Illinois Department of Public Health (IDPH) in June. The expectation of statewide health experts is that measles will return to Illinois in the coming months. This is mainly due to heavy travel through Chicago airports and summer festivals. County health departments have now been tasked with keeping an eye on their measles vaccine rates and identifying areas where vaccine rates are low.
Peoria County's measles vaccine rate is quite high, around 95%. But outlying communities in central Illinois have lower vaccine rates, normally more rural counties. Health experts at Michigan Medicine call the Great Lake State “ripe for a measles outbreak,” as only 66% of toddlers receive the recommended childhood immunizations.
Measles symptoms
"Measles typically presents with a high fever, typically much higher than what we'd see with seasonal colds or influenza. Fevers can be 104 or 105 degrees Fahrenheit," Dr. Kasper says. "That's followed by a runny nose and a characteristic rash. This typically develops on the head and then spreads down the rest of the body."
“We don’t want to go back”
"Measles at its peak, in the 1950s before the vaccine, led to a significant number of hospitalizations in young children. Around 50,000 hospitalizations were estimated per year and about 500 deaths," Dr. Kasper says. "We don't want to go back to that scenario in any capacity, where we have a large number of unvaccinated people. The outcomes could be too severe."
Immunocompromised people like those who have received an organ transplant, cancer patients or those on long-term therapies that could impact their immune system, are at high risk for measles.
Why vaccines are so important right now
Summer travel along with large crowds at places like airports and theme parks, will likely bring more measles cases to the United States.
"This time, as good as any time, is to make sure somebody is updated on their vaccinations. If somebody isn't sure if they were vaccinated as a child, they should talk to their primary care provider about testing or receiving the vaccine. If someone is immunocompromised and they might be at a higher risk for measles through travel in areas that have exposure, they should talk to their primary care provider about the vaccine," Dr. Kasper says. "If someone has young children or is at an age where vaccine is recommended, we wholly recommend for them to discuss with their provider to remain up to date on their vaccine series."
Vaccine hesitancy continues to be a topic of discussion, one that Dr. Kasper recommends patients openly discuss with their medical provider.
Natural immunity is not a viable option with measles. The highly infectious nature of the virus, along with the severity of symptoms and potential for long-term complications, make it an illness people need to try and avoid entirely.
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