Ethan Lindenberger began by questioning his parents' anti-vaccine stances and eventually got himself inoculated, a rebellion that caught the attention of the national media - and now Congress.

The 18-year-old from Ohio announced Saturday on YouTube that he had been invited to speak before the Senate Committee on Health, Education, Labor and Pensions at a hearing Tuesday devoted to examining outbreaks of preventable diseases. He will appear alongside experts such as John Wiesman, Washington state's secretary of health, and Saad B. Omer, a professor at Emory University, according to the committee's website.

"I'm looking forward to speaking in Washington, D.C.," Lindenberger said in the video.

Lindenberger's story has caught on amid a measles outbreak that has affected dozens of people in the United States, prompting increasing scrutiny of parents who do not get their children vaccinated. The teenager said he lived for years without being vaccinated because of his mother's belief in vaccine conspiracies. So Lindenberger began to do his own homework, consulting scientific research and the Centers for Disease Control and Prevention.

Video: Ethan Lindenberger, 18, of Norwalk, Ohio, decided to get vaccinated against his mother's wishes. He turned to Reddit for answers. (Allie Caren/The Washington Post)

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In November, he posted on Reddit asking for advice about how to get vaccinated. In December, Lindenberger went to the Ohio Department of Health in his hometown and received a battery of standard vaccinations that included hepatitis A, hepatitis B, influenza and HPV, according to records reviewed by The Washington Post. Because he was 18, he could legally make the decision to do so.

"I looked into it; it was clear there was way more evidence in defense of vaccines," he told The Post in February.

His mother, Jill Wheeler, told Undark, an online science magazine that first reported Lindenberger's story, that her son's decision was "like him spitting on me, saying 'You don't know anything, I don't trust you with anything."

According to Lindenberger's Reddit post, his father was less resistant to the idea since Ethan was of legal age.

Ohio is one of 17 states that allow parents to opt out of vaccines for philosophical or moral reasons. Lindenberger has four younger siblings, including a 2-year-old sister who he says will probably not be vaccinated.

"It breaks my heart that she could get measles and she'd be done," Lindenberger told The Post.

The Senate hearing comes as 68 people have contracted measles in the Pacific Northwest, the Associated Press reported. Oregon and Washington state allow parents to opt out of vaccinating their children for personal or philosophical reasons, and the region is home to a particularly vocal concentration of parents who choose not to get their children vaccinated. Washington state is hoping to pass a bill to narrow the exemptions for vaccines but is facing opposition from "anti-vaxxers," who believe a debunked conspiracy theory that vaccines cause health conditions such as autism.

The CDC says measles outbreaks can be linked to an increase in the number of people who travel abroad and bring the disease back to the United States and to communities with pockets of unvaccinated individuals. According to the CDC, there were 17 outbreaks nationwide last year, primarily concentrated in three states. The outbreaks were associated with some communities of Orthodox Jews who chose not to vaccinate and contracted the disease when travelers returned from Israel, which was experiencing an outbreak.

In 2017, an outbreak that affected 75 people in a Somali-American community in Minnesota was attributed to low vaccination coverage.

This article was written by Kayla Epstein, a reporter for The Washington Post. The Washington Post's Alex Horton contributed to this report.