ALBANY — New York National Guard troops were deployed to a Health Department command post in New Rochelle early Tuesday as Gov. Andrew M. Cuomo said a one-mile radius in that community will be subjected to a two-week containment, including closing of public gathering facilities and at least a dozen schools.

The containment effort is scheduled to begin Thursday and continue through March 26. The Westchester County city has 108 of the state's 173 confirmed cases of the illness, which Cuomo said has emerged as the area of the nation with the largest concentration of cases. Fourteen individuals with coronavirus in the state are hospitalized and, nationally, the number of confirmed cases has passed 800.

"New Rochelle is a particular problem; it's what they call a cluster," Cuomo said of the one-mile radius that is centered around an area where the first cases had been discovered in that community — involving a 50-year-old attorney and his family — nearly two weeks ago.

The deployment of National Guard troops, who will assist with cleaning public facilities and delivering food to people quarantined in their residences, came as Chinese Premier Xi Jinping visited Wuhan, the city where the outbreak began, and declared that China has gained control of the flu-like virus. But New York remains in a battle with coronavirus, and many New York colleges – including the Capital Region's Skidmore College and Rensselaer Polytechnic Institute – responded this week by extending spring break periods or making plans for students to participate in classes remotely.

But Cuomo and Health Commissioner Howard Zucker on Tuesday said the state's primary focus is New Rochelle, where public health nurses, law enforcement officers and National Guard troops are helping monitor and test people who have been quarantined or are considered at high risk for contracting the flu-like illness. That work includes collecting respiratory samples for testing, ensuring people who have been quarantined remain in their residence, and delivering food to those who have been asked to stay home.

"This is an evolving situation," Zucker said. "We have moved from a containment strategy to more of a mitigation strategy. ... We felt that a radius of a mile from that spot would be effective."

Cuomo and Zucker said that "public" facilities would be ordered shuttered, but it's unclear whether the state will ask — or demand — that private businesses, including gyms and children's recreational facilities, also close their doors for two weeks. They said that six public schools and three private schools would be closed in New Rochelle, as well as three private schools outside the containment zone.

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Cuomo again noted that elderly and those with compromised immune systems are at greatest risk — just as they are with the common flu — and this week he cautioned that the "panic that you see, is unwarranted. We have dealt with worse viruses."

The National Guard troops were deployed to a Health Department command post where nurses are being outfitted with protective gear before being sent to gather coronavirus samples and to check on those under quarantine at their residences.

The coronavirus outbreak has also impacted New York's budget planning during what is normally the height of negotiations between the governor, Legislature and the special interests who normally flock to Albany to make their case for state funding.

Fearing a continuing economic downturn stemming from the coronavirus, Cuomo on Tuesday asked state Comptroller Tom DiNapoli to reassess the state's revenue projections ahead of the April 1 budget deadline. The governor’s office and both legislative chambers agreed earlier this month that the state anticipates $700 million more in revenue this fiscal year than initially projected in the January executive budget – with the caveat that the coronavirus is an “exceedingly significant downside risk to the economic and revenue forecasts."

Cuomo asked DiNapoli to complete his assessment within a week.

In an appearance on CNN Tuesday morning, Cuomo said that New York and other states are not doing enough testing and he noted that other nations including South Korea and China have conducted thousands more tests per day, albeit with methods that may not be as accurate as those used in the United States.

"What you will see is the number will continue to increase because they have increased," he said. "We’re not testing enough people to know where it is."

In recent briefings, Cuomo said the state is processing about 500 coronavirus tests per day, but that private labs were being authorized to assist that effort.

After Boston officials announced they are canceling their St. Patrick's Day parade, to limit crowd gatherings, Cuomo said "that's one of the things we're looking at" when asked if New York City or other cities across the state should cancel parades.

"This is such a different situation in different parts of the state," Cuomo said.

The state continues testing and mandating quarantines for those exposed to or infected by the virus. Of the 142 confirmed cases announced Monday, eight of those individuals were hospitalized. Cuomo tweeted Tuesday there were 8,459 confirmed cases of the flu in New York last week.

"People are reacting like this is the Ebola virus," Cuomo said Monday of the reaction to COVID-19. "This spreads like the flu but most people will have it and they get on with their lives."

Ninety-eight of New York's cases are in Westchester County, including 16 new cases announced Monday. The others are New York City (7), Nassau County (17), Rockland County (4), Saratoga County (2) and Suffolk and Ulster counties, each with one case. The details on the 25 new cases that Cuomo announced Tuesday morning have not been released.

The nurses deployed in New Rochelle and across the state are being trained in how to use and discard special protective clothing and respirator masks they wear inside the residence of someone who is symptomatic. They are supposed to remove the clothing and wrap it in a bag that is left outside the residence — usually in an external trash can, according to guidelines being circulated among the nurses.

Health Department Commissioner Howard Zucker said that nursing homes in Westchester County have been directed to suspend visitations and schools will be closed for at least 24 hours if a student or teacher tests positive for the virus. That initial 24-hour period would be used to clean the facility and determine whether a longer period of closure for that school is necessary.

The governor announced he is also pushing the Legislature to take action on a bill that would compel employers to provide paid-sick leave for workers, including those quarantined as a result of the virus.

Advocates and elected officials also raised concerns this week about the potential for coronavirus to invade state prisons and other detention facilities, where the ability to contain and treat the illness may be difficult.

Khalil Cumberbatch, chief strategist for New Yorkers United for Justice, said incarcerated individuals are particularly vulnerable to COVID-19 because of close quarters and "subpar conditions" in jails and prisons.

"An outbreak would exacerbate an already stretched prison health system," he said in a statement. He urged detention facilities to establish a protocol to prevent the outbreak from hitting and spreading among incarcerated people.

Cayla Harris, Massarah Mikati and Rachel Silberstein contributed reporting for this story.