Coronavirus updates: CDC forecasts up to 226K US deaths by mid-October

Swiss authorities have ordered a quarantine for the entire undergraduate student population of a prestigious hospitality management school after "significant outbreaks" of COVID-19.

Health officials in Switzerland's Vaud canton, or region, announced Wednesday that all 2,500 undergraduate students at the "Ecole hoteliere de Lausanne" (EHL) must self-quarantine until at least Monday, whether they live on- or off-campus. Those who develop symptoms are advised to get tested for COVID-19, if necessary.

"Significant outbreaks of infection have appeared in several levels of training, making it impossible to close more targeted than that of the 2,500 students concerned," health officials said in a statement, adding that student parties are suspected to "be at the origin of these numerous outbreaks of infection."

Classes will continue online in the meantime.

Health officials said the school's administrators are taking "all the necessary measures" to ensure that learning isn't disrupted and to reinforce health measures on campus.

The parties in question took place just before the enforcement of coronavirus-related measures announced by regional authorities on Sept. 15, according to a spokesperson for the school, Sherif Mamdouh.

In a statement obtained by ABC News on Thursday, Mamdouh said that the school is "working closely" with regional health authorities "to provide best possible support to the contaminated students, who have so far reported only minor symptoms." Remote learning courses had already been imposed for all undergraduate students from Sept. 21-28, according to Mamdouh.

"EHL had prepared contingencies plans over the summer, and had put in place a hybrid and flexible learning infrastructure, which allows EHL to control population density almost in real time and ensure continuity of the academic program," Mamdouh said in the statement. "An important system has been put in place on campus to ensure the highest health standards and to limit the spread of the virus as much as possible."

Since the start of the coronavirus pandemic, Switzerland's Federal Office of Public Health has reported at least 51,492 confirmed cases of COVID-19, with 4,809 hospitalizations and 1,776 deaths.

Israel's government has decided to tighten coronavirus-related restrictions as cases continue to climb, despite a second nationwide lockdown.

Prime Minister Benjamin Netanyahu's cabinet voted early Thursday to close all nonessential businesses, including open-air markets. The cabinet also agreed that prayers and political demonstrations should be limited to open spaces with a cap of 20 people and that participants should not be allowed to travel more than 1,000 meters (0.6 miles) from home to attend either.

The new measures are set to go into effect Friday afternoon, as the Jewish state shuts down for the weekly Sabbath ahead of Yom Kippur on Sunday and Monday. The restrictions on demonstrations, however, are subject to approval by Israel's parliament, the Knesset.

Israel has seen one of the world's highest per capita rates of COVID-19 infections over the past two weeks. The country entered a second lockdown last Friday and it's slated to last until mid-October.

ABC News' Bruno Nota contributed to this report.

An internal memo from the Federal Emergency Management Agency obtained by ABC News on Wednesday night shows that 22 U.S. states and territories are in an upward trajectory of COVID-19 infections, while 13 jurisdictions are at a plateau and 21 others are in a downward trend.

The number of new cases recorded in the United States is increasing by double digits in week-over-week comparisons, while the number of new deaths is down. There also continues to be a steady rise in the number of hospitals nationwide where more than 80% of beds in intensive care units are filled, according to the memo.

In Alabama's Limestone County, 90% of ICU beds across two hospitals were in use. The Alabama Hospital Association confirmed that a shortage of nurses is a statewide issue in both hospitals and universities due to a lack of faculty, facilities and funds, the memo said.

Florida's Leon County reported a 20% increase in COVID-19 cases among children since Aug. 10, around the start of the new school year, coinciding with a 20% increase in pediatric hospitalizations, according to the memo.

Meanwhile, the number of new cases recorded in Kentucky have increased by 21% since Sept. 13. The state's seven-day fatality rate has doubled since then, from 13.4 to 26.4 per 1 million population. The number of COVID-19 tests being conducted statewide declined by 45.2% during the week ending Sept. 17, compared with the previous week, according to the memo.

Michigan's seven-day case rate increased by 154.4% from Sept. 13 to Sept. 20. The state also reported a 38.1% week-to-week relative increase in COVID-19 testing on Sept. 17. Officials attribute the surge to schools and colleges, with 20-year-olds making up the largest portion of total cases, the memo said.

ABC News' Josh Margolin contributed to this report.

An additional 1,098 coronavirus-related fatalities were recorded in the United States on Wednesday, according to a real-time count kept by Johns Hopkins University.

Wednesday's tally of COVID-19 deaths is lower than the country's record set on April 17, when there were 2,666 new fatalities in a 24-hour reporting period.

There were also 36,330 new cases of COVID-19 confirmed across the nation on Sunday, down from a peak of 77,255 new cases reported on July 16.

A total of 6,934,205 people in the United States have been diagnosed with COVID-19 since the pandemic began, and at least 201,909 of them have died, according to Johns Hopkins. The cases include people from all 50 U.S. states, Washington, D.C. and other U.S. territories as well as repatriated citizens.

By May 20, all U.S. states had begun lifting stay-at-home orders and other restrictions put in place to curb the spread of the novel coronavirus. The day-to-day increase in the country's cases then hovered around 20,000 for a couple of weeks before shooting back up and crossing 70,000 for the first time in mid-July. The daily tally of new cases has gradually come down since then.

An internal memo from the Federal Emergency Management Agency obtained by ABC News on Wednesday night shows that the number of new cases and the number of new deaths recorded in the United States are both increasing in week-over-week comparisons.