Two prominent virologists from the National Institute of Allergy and Infectious Diseases face federal smuggling charges for bringing inactivated monkeypox virus samples into the United States without proper declarations, a case that has become a lightning rod for political tensions over laboratory security and biosafety.
Dr. Vincent Munster, head of virus ecology at NIAID’s Rocky Mountain Laboratories, and Dr. Claude Kwe, also of NIAID, were charged in federal court in the Eastern District of Michigan after returning from field work in the Democratic Republic of Congo in January 2026. Both have pleaded not guilty.
The charges: smuggling, false statements, and failure to declare biological materials. The case has drawn attention far beyond the scientific community, with Republican Sens. Tom Cotton of Arkansas and Rand Paul of Kentucky seizing on the incident as evidence of inadequate biosafety oversight.
The samples in question
The FBI complaint states that the luggage Munster and Kwe carried through Detroit Metropolitan Airport contained MPXV DNA, the monkeypox virus, but that testing confirmed the samples were non-infectious.
Virologist Angela Rasmussen of the University of Saskatchewan described the safety profile bluntly on her blog: “You could drink them and not get infected.”
Potent chemical inactivation protocols, designed in part by Munster himself (Fischer et al., 2022), reliably render the virus inert. No one disputes that the samples posed no infectious risk.
But safety and legality are different questions. Inactivated viral samples do not require an import permit under U.S. regulations, but they must be declared to customs officials and accompanied by a certification of deactivation. According to the FBI, Munster and Kwe did neither.
“Munster and Kwe did not present the true identities of the biological materials in their possession and did not provide or possess the necessary certifications,” the complaint states. Rather, they allegedly “attempted to pass the samples off as unused diagnostics.”
Field realities vs. border regulations
The case highlights a tension familiar to field virologists. Researchers working in outbreak zones often face logistical challenges that make formal sample transport impractical, including limited infrastructure, unreliable courier services, and the urgency of getting samples to well-equipped labs for analysis.
Jean-Paul Gonzalez, a Georgetown virologist and biosecurity specialist, noted that hand-carrying samples on commercial flights was once common practice. “We did that 20 years ago. We don’t do that any more,” he said.
But Munster’s background complicates the picture. He is a highly respected researcher with decades of experience tracking Ebola and emerging monkeypox strains. He and his spouse, Emmie de Wit, also a Rocky Mountain Lab virologist, won the 2020 Golden Goose Award for camel coronavirus research that led directly to COVID-19 antiviral treatments. He also co-authored the 2022 paper describing the very inactivation protocols used on the Congo samples.
Melanie Ott of the Gladstone Institutes, a virologist not involved in the case, offered a measured assessment: “The regulations have to be followed. The virology community is not standing for taking shortcuts.”
Political dimensions
The legal case has been amplified by political actors. Sen. Cotton introduced the “Biosecurity Smuggling Deterrence Act,” which would mandate severe sentences for smuggling biological agents. “Illegally smuggling dangerous viruses into our country threatens the health and safety of all Americans,” he said in a statement.
Sen. Paul went further, releasing dozens of pages of internal NIH emails on June 5 that he claimed showed a pattern of regulatory violations by Munster. The emails include a 2011 exchange in which another researcher suggested that Munster could “hand carry” viral samples on a commercial flight, though they do not show that he actually did so.
Benton Martin, the federal public defender representing Kwe, said his client is presumed innocent. Munster’s attorney did not respond to requests for comment. Munster’s initial court hearing is scheduled for July 22.
Neither Rocky Mountain Laboratories nor the Department of Health and Human Services has commented on the case, citing the ongoing legal proceedings.
Broader implications
The charges arrive at a sensitive moment. A growing monkeypox outbreak prompted the World Health Organization to declare a global health emergency earlier this year. The ability to move samples quickly between field sites and reference laboratories is essential for tracking viral evolution and testing countermeasures.
If the case results in convictions, it could chill researchers’ willingness to transport samples across borders, even inactivated ones, at a time when such work is most needed. But the scientific community’s response has been notably restrained. While many virologists acknowledge the procedural hurdles Munster and Kwe faced, few have defended their alleged failure to follow import regulations.
The case represents a collision between the practical necessities of outbreak science and the legal architecture of biosecurity, a collision that, in an increasingly polarized political environment, shows no signs of resolving quietly.
Reference: Garisto, D. (2026). “Smuggling charges against NIH virologists trigger political uproar.” Nature News. DOI: 10.1038/d41586-026-01995-7