Stephen Colbert fiercely criticized Robert F. Kennedy Jr. on “The Late Show” for slashing $500 million in vaccine research funding, expressing his outrage with biting humor and strong language, warning that such cuts could endanger lives and undermine public health efforts.

In a fiery segment on “The Late Show” aired on August 6, 2025, Stephen Colbert took aim at Robert F. Kennedy Jr. after the U.S. Health and Human Services Secretary announced a shocking $500 million cut to vaccine research funding.

The announcement, which has raised alarm bells among public health advocates, prompted Colbert to deliver a scathing critique of Kennedy’s decision, accusing him of jeopardizing lives with his reckless actions.

During the episode, Colbert opened with a tongue-in-cheek promise to provide a “measured, nonpartisan response” before launching into a passionate tirade against Kennedy.

The host’s disdain was palpable as he referred to Kennedy in derogatory terms, calling him a “roid-addled nepo-carnie,” a phrase that drew roaring applause from the audience. Colbert’s choice of words highlighted his frustration with what he perceives as a dangerous disregard for public health.

The cuts announced by Kennedy will affect 22 key projects focused on mRNA technology, which has been instrumental in the rapid development of COVID-19 vaccines during the pandemic.

Colbert likened the decision to navigating a road trip to an amusement park using only the stars for direction instead of modern GPS technology, emphasizing the absurdity of abandoning cutting-edge science in favor of outdated methods.

In a clip played during the segment, Kennedy defended his decision by claiming that many of the vaccines funded were for flu or COVID-19, arguing that mRNA vaccines “don’t perform well against viruses that infect the upper respiratory tract.”

Colbert was quick to counter this assertion with a sharp retort: “Counterpoint, f*** you, you road-munching, luddite, human Slim Jim. You’re gonna kill people.”

This bold statement underscored Colbert’s belief that Kennedy’s actions could have dire consequences for public health.

The segment escalated as Colbert continued to express his outrage, throwing up his middle finger to the camera and further inciting the audience’s cheers.

His passionate delivery and biting humor turned the late-night show into a platform for serious critique, showcasing how comedy can intersect with urgent public health issues.

Colbert’s willingness to confront a controversial figure like Kennedy highlights the role of comedians in addressing societal concerns, especially in an era marked by misinformation and skepticism surrounding vaccines.

Colbert’s outburst comes at a time when public trust in vaccines is crucial, particularly as new variants of viruses continue to emerge.

By calling out Kennedy, who has long been a controversial figure in the vaccine debate, Colbert aligns himself with those advocating for science-based policies and public health initiatives.

His remarks resonate with viewers who are concerned about the potential repercussions of slashing funding for vaccine research, especially in light of the ongoing challenges posed by infectious diseases.

The backlash against Kennedy’s decision has been swift, with public health officials and advocates expressing their dismay over the cuts.

Many have pointed out that the advancements made in mRNA technology have not only benefited COVID-19 responses but also hold promise for future vaccines against various diseases.

Colbert’s segment amplifies these concerns, urging viewers to consider the broader implications of such funding reductions.

As the segment concluded, Colbert’s passionate defense of vaccine research and his scathing critique of RFK Jr. left a lasting impression on viewers.

The late-night host’s ability to blend humor with serious commentary underscores the power of comedy in shaping public discourse.

In a landscape where misinformation can spread rapidly, Colbert’s willingness to confront dangerous narratives head-on serves as a reminder of the importance of advocating for science and public health.

This episode of “The Late Show” not only entertained but also sparked important conversations about the future of vaccine research and the responsibility of public figures in promoting health initiatives.

As Colbert continues to navigate the complexities of late-night television, his commitment to addressing pressing issues remains a defining feature of his career, solidifying his role as a significant voice in contemporary media.