The first person in the U.S. known to be infected with a new and apparently more contagious variant of the coronavirus was identified Wednesday as a Colorado National Guardsman who had been sent to help out at a nursing home struggling with an outbreak. And health officials said a second Guard member may have it, too.

The cases have triggered a host of questions about how the mutant version circulating in England arrived in the U.S. and whether it is too late to stop it now, with top experts saying it is probably already spreading elsewhere in the country. The discovery has also added urgency to the nation’s vaccination drive.

“A Colorado Army National Guard member has tested positive for a new COVID-19 strain,” said Air Force 2nd Lt. Katie Lee, a Colorado National Guard spokesperson, in an email to Military Times.

The two Guard members had been dispatched on Dec. 23 to work at the Good Samaritan Society nursing home in the small town of Simla, a mostly rural area about 90 miles outside Denver, said Dr. Rachel Herlihy, state epidemiologist. They were among six Guard members sent to the home.

At least 80 Guard troops are currently on Title 32 orders throughout the state “administering COVID-19 tests and distributing COVID-19 vaccine,” said Lee.

In a statement to Military Times, Army Brig. Gen. Laura Clellan, Colorado’s adjutant general, described the current moment. “It is a challenging time, and this is our longest and largest domestic response in state history, but we have successfully balanced readiness demands against the need for a higher level of heath-and-safety protections across the force.”

Lee explained that the state has been “isolating critical personnel, dividing unites into separate cohorts, and following CDC recommendations.”

A state laboratory began looking for signs of the variant after its spread was announced in England earlier this month, Herlihy said. Staff and residents at the nursing home who tested positive for the coronavirus are having their samples screened for the variant, and so far no evidence of it has been found, she said.

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The confirmed case is in a Colorado man in his 20s who hadn’t been traveling, officials said. He has mild symptoms and is isolating at his home near Denver, while the person with the suspected case is isolating at a Colorado hotel, Herlihy said.

Guard officials declined to release more information about the servicemember “in order to protect [his] privacy.”

A call to the nursing home was not immediately returned.

The alarming new version was first identified in Britain, where infections are soaring and hospitalizations have climbed to the highest levels on record. It has also been found in several other countries.

Scientists in Britain have found no evidence that it is more lethal or causes more severe illness, and they believe the vaccines now being dispensed will be effective against it.

Nevertheless, the discovery overseas led the U.S. Centers for Disease Control and Prevention to issue rules on Christmas Day requiring travelers arriving from Britain to show proof of a negative COVID-19 test.

The variant is probably still rare in the U.S., but the Colorado patient’s lack of travel history means it is spreading, perhaps seeded by visitors from Britain in November or December, said scientist Trevor Bedford, who studies the spread of COVID-19 at the Fred Hutchinson Cancer Research Center in Seattle.

“Now I’m worried there will be another spring wave due to the variant,” Bedford said. “It’s a race with the vaccine, but now the virus has just gotten a little bit faster.”

“The virus is becoming more fit and we’re like a deer in the headlights,” warned Dr. Eric Topol, head of Scripps Research Translational Institute,

He noted that the U.S. does far less genetic sequencing of virus samples to discover variants than other developed nations, so the finding in Colorado probably means it is already spreading in other parts of the country and it is too late for travel bans.

“We’re behind in finding it. Colorado is likely one of many places it’s landed here,” Topol said. “It’s all over the place. How can you ban travel from everywhere?”

Colorado public health officials are conducting contact tracing to determine its spread, and Gov. Jared Polis said infections are being monitored closely.

British Prime Minister Boris Johnson reported the weekend before Christmas that the variant was moving rapidly through London and southeast England. The region was placed under strict lockdown measures, and dozens of countries banned flights from Britain. France also briefly barred trucks from Britain before allowing them back in, provided the drivers got tested for the virus.

Japan announced a ban Monday on all nonresident foreigners as a precaution.

New versions of the virus have been seen almost since it was first detected in China a year ago. It is common for viruses to undergo minor changes as they reproduce and move through a population. The fear is that mutations will become significant enough to defeat the vaccines.

South Africa has also discovered a highly contagious COVID-19 variant that is driving the country’s latest spike of cases, hospitalizations and deaths.

Editor’s Note: This article has been updated to add new information from the Colorado National Guard.

Davis Winkie covers the Army for Military Times. He studied history at Vanderbilt and UNC-Chapel Hill, and served five years in the Army Guard. His investigations earned the Society of Professional Journalists' 2023 Sunshine Award and consecutive Military Reporters and Editors honors, among others. Davis was also a 2022 Livingston Awards finalist.

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