SEOUL, South Korea --- South Korea has reported 323 new cases of the coronavirus, marking its 16th consecutive day of triple-digit daily jumps, as health officials prepare to tighten social distancing restrictions in the greater capital area.

The numbers released by the Korea Centers for Disease Control and Prevention Saturday brought the national caseload to 19,400. Fatalities reached 321 after the country added five more deaths overnights.

The KCDC said 249 of the new cases came from the densely populated Seoul metropolitan area, where about half of the country's 51 million people live, where health workers have struggled to track infections linked to various places, including churches, restaurants, schools and apartment buildings.

The country has added 4,630 cases over the 16 days, raising fears about possible shortages in hospital capacities.

For eight days starting Sunday, the country will allow restaurants to provide only food deliveries and takeout meals after 9 p.m., franchised coffee shops like Starbucks to provide only takeout drinks and food and to shut down gyms and after-school academies to slow the viral spread.

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HERE'S WHAT YOU NEED TO KNOW ABOUT THE VIRUS OUTBREAK

— Thousands of U.S. Health departments tell CDC: Reverse testing guidance

— Four people at RNC event in Charlotte test positive for coronavirus

— TikTok celebrities charged with misdemeanors for large parties in LA

— Credibility of FDA and CDC damaged after controversial decisions that outside experts say imply political pressure from the Trump administration.

— Some college towns are dealing with too much partying and too many COVID-19 infections among students.

— Joe Biden and Kamala Harris prepare to travel more as campaign heats up. They've worn masks in public and Biden has called on governors to order mask-wearing in their states.

— Follow AP's pandemic coverage at http://apnews.com/VirusOutbreak and https://apnews.com/UnderstandingtheOutbreak

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HERE'S WHAT ELSE IS HAPPENING:

ALABAMA — The University of Alabama reported Friday that an additional 481 students have tested positive for COVID-19, bringing the total to more than 1,000 infections since students returned to campus for the fall.

The University of Alabama System released new numbers on its dashboard of cases for all three campuses. The additional 481 cases on the Tuscaloosa campus were reported between Aug. 25 and Aug. 27. The university system said no students are hospitalized.

"We are closely monitoring our data daily, and we will continue to adjust operations as the situation warrants," said UA System Chancellor Finis St. John in a statement accompanying the release of the numbers. He said testing for the virus was a "key pillar" of the university's health and safety plan.

St. John said every student on the three campuses has the option of moving to fully online instruction at any time, remaining either on campus or returning home to continue their course work.

The university has not announced official fall enrollment figures. Kellee Reinhart, a spokeswoman for the university system, said the enrollment will be upwards of 30,000, which would equate to infections being reported in about 3.3% of all students.

The quick rise in COVID-19 cases on campus prompted action from city and university officials to try to limit student gatherings and off-campus socializing.

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ATLANTA - A 1-year-old boy is now Georgia's youngest victim to die from COVID-19.

The state Department of Public Health included the suburban Atlanta boy in a table of deaths released Friday.

The department says the boy had a chronic underlying condition that may have contributed to his death, but released no further information. The Cobb County Medical Examiner's Officer says it can't release further information until the boy's death certificate is completed.

He's one of 5,471 people to die in Georgia so far from the respiratory illness. Deaths from Georgia's summer spike remain elevated, having averaged 68 over the seven days ending Friday.

The boy displaces a 7-year-old Chatham County boy as the state's youngest victim of the respiratory illness. A preliminary count by the Centers for Disease Control and Prevention found only 29 deaths involving coronavirus among children younger than five nationwide.

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CHARLOTTESVILLE, Va. -- The University of Virginia announced Friday that it is moving ahead with plans to offer in-person instruction for the fall semester.

In a statement posted on the school's website, UVA officials said they had initially delayed the start of in-person undergraduate classes by two weeks to allow for more assessment of the spread of COVID-19. They also said they delayed the decision in order to take a look at how other schools have fared since opening.

UVA said it is now proceeding with plans to welcome students to residence halls starting Sept. 3 and to begin in-person instruction for undergraduates on Sept. 8.

"We know some will be delighted to hear this news and others will be disappointed," the statement said. "To be frank, it was a very difficult decision, made in the face of much uncertainty, and with full awareness that future events may force us to change course."

The Richmond Times-Dispatch reported Friday that UVA has reported 67 total positive COVID cases since Aug. 17 among students, faculty and staff. Of those, 23 were students who reported a positive test on Thursday, the school's highest single-day total. Twenty-five students, faculty or staff have been hospitalized.

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FOSTER CITY, California — U.S. regulators are now allowing use of experimental antiviral drug remdesivir for all patients hospitalized with COVID-19, drugmaker Gilead Sciences said Friday.

It said the Food and Drug Administration has expanded its emergency use authorization, which lets doctors administer the IV drug during the pandemic. Until now, that was limited to patients with severe COVID-19.

Foster City, California-based Gilead applied to the FDA on Aug. 10 for formal approval of remdesivir, to be sold under the brand name Veklury.

Gilead said in a statement that the expanded emergency use was based on results of a recent federal study of hospitalized patients with different levels of severity, plus a Gilead study published a week ago. Gilead's study found that among hospitalized patients with moderate COVID-19, those getting remdesivir were 65% more likely to improve after a five-day treatment course than those just getting standard care.

Remdesivir previously was shown to shorten treatment by about four days for hospitalized patients with severe disease, compared with those getting standard supportive care.

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NEW ORLEANS — New Orleans's youngest public school students will begin returning to classrooms as early as Sept. 14, the city's school superintendent said Friday as he announced a phased re-opening plan tied to the control of COVID-19.

Henderson Lewis said the plan is for students from prekindergarten through 4th grade to begin returning to schools in phases beginning Sept. 14. Older students will begin returning in October.

"We know that our youngest students have the most to gain from in person learning," Lewis said.

All of the plans are contingent on current trends indicating the spread of the virus has been successfully limited in the city, Lewis and Dr. Jennifer Avegno, the city's health officer, said.

The benchmarks include a continued new-case rate of less than 50 per day in the city.

Statewide, the health department reported more than 600 new confirmed cases Friday, bringing the total to at least 146,243, with nearly 128,000 presumed recovered. Thirty newly reported deaths brought the virus-related death toll to at least 4,741.

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TOPEKA, Kansas — Fueled in part by college students returning to classes, Kansas has set another pandemic record for the seven-day increase in coronavirus cases, with the surge prompting a school district to put the brakes on some fall sports and another to extend its mask ordinance.

Statewide, the number of new reported cases rose by 1,111 from Wednesday to Friday, bringing the total to 41,048. The state Department of Health and Environment also reported an additional six COVID-19-related deaths, to put the pandemic total at 443.

The average for the seven days ending Friday was 599, 3.6% more than the previous record of 578 for the seven days ending Wednesday. The state also reported 16 clusters in colleges and universities with 189 cases.

Gov. Laura Kelly called the most recent spike in coronavirus cases "horrendous" and said her administration is looking into why it has occurred. But she said outbreaks on college campuses and fraternities and sororities are a factor.

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SANTA FE, N.M. -- Political party delegates from New Mexico who traveled to the Republican National Convention or President Donald Trump's speech at the White House are obligated to self-quarantine for 14 days as they return home under a state public health order.

A spokeswoman for Democratic Gov. Michelle Lujan Grisham said Friday that the delegates fall under a self-quarantine provision for most travelers as they enter or return to New Mexico.

Delegate and GOP national committee member Tina Dziuk says she will abide by the state health order and self-quarantine after attending the White House speech, where many people ignored federal guidelines about keeping distance, avoiding crowds and wearing masks to fight the spread of the coronavirus.

Dziuk says she wore a mask to the White House and that New Mexico delegates took responsible steps at the convention to manage potential virus exposure by wearing masks, undergoing COVID-19 test and carrying contract-tracing devices.

The self-quarantine mandate did not apply to New Mexico Democrats, including the governor, because they attended their party's national convention remotely by video feed without leaving the state.

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OTTAWA — Canada is extending restrictions on travelers arriving in the country for another month to help combat the spread of COVID-19, Public Safety Minister Bill Blair said on Twitter Friday.

New arrivals in Canada are required to quarantine for 14 days if they don't show COVID-19 symptoms or isolate for 14 days if they do.

"Our government is extending the existing restrictions on international travel to Canada by one month — until September 30, 2020 — to limit the introduction and spread of COVID-19 in our communities," Blair in a Tweet.

"Canadian citizens and permanent residents returning to Canada will continue to be subject to strict quarantine measures."

Canadian citizens and permanent residents who are returning home to Canada will continue to be subjected to strict quarantine measures.

Canada has taken steps to stem the flow of foreign nationals into the country by restricting discretionary travel, including for tourism, recreation and entertainment.

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LANSING, Mich. — Michigan has crossed the threshold of 100,000 cases of the coronavirus confirmed since March.

Deaths related to COVID-19 reached 6,446 after six more were recorded, the state health department said Friday.

Most people recover from the virus. It can cause mild or moderate symptoms, such as fever and cough, that clear up in two to three weeks. But for some, especially older adults and people with existing health problems, it can cause pneumonia and lead to death.

Dr. Dennis Cunningham at McLaren Health Care said the number of people who were infected is likely higher than the confirmed cases of 100,699. He noted that enough tests weren't available in the early weeks of the outbreak.

"We just haven't had enough testing supplies to test every asymptomatic person, either," Cunningham told MLive.com.

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RENO, Nev. — Nevada officials are reporting what may be the first documented case of coronavirus reinfection in the United States, following similar reports earlier this week from Hong Kong and Europe.

A 25-year-old Reno man with mild COVID-19 symptoms initially was found to have the virus in April, recovered and tested negative twice, and then tested positive again in June. He was much sicker the second time, with pneumonia that required hospitalization and oxygen treatment.

Genetic tests from each episode showed that viruses were similar in major ways but differed in at least 12 spots that would be highly unlikely from natural evolution of the bug if the man had it continuously rather than being infected a second time, said Mark Pandori, director of the Nevada State Public Health Laboratory.

A parent the man lives with also tested positive in June, so it's possible he acquired a new infection that way.

The findings have not yet been published or reviewed by other scientists, but were posted on a research site.

The case "should cement in our minds that there's no such thing ... as invulnerability" to the virus, even if you've already had it, Pandori said. "One can get sick again and that illness can be quite severe."

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LITTLE ROCK, Ark.— Arkansas' top health official on Friday said the state is beginning to see coronavirus outbreaks at its college campuses as the number of confirmed cases statewide rose by 838. The Department of Health said at least 59,583 people have tested positive for the virus. The department said 5,496 of those are active cases that don't include people who have died or recovered. The number of people who have died from COVID-19, the illness caused by the virus, rose by 17 to 756. The number of people hospitalized dropped by 26 to 407.

Dr. Jose Romero, the state's health secretary, said testing events are planned at universities where officials are seeing outbreaks. In one instance, Romero said, one-third of 75 people tested recently at the University of Arkansas at Fayetteville tested positive. "That is an alarming amount," he said.

Gov. Asa Hutchinson said 181 of the new cases reported Friday came from correctional facilities, most from the state's Varner Unit.

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ITASCA, Ill. — The American Academy of Pediatrics has joined critics calling for the federal Centers for Disease Control and Prevention to reverse its updated position on COVID-19 testing.

"In the battle against the COVID-19 pandemic, we must be led by the science, in a fully transparent process that engages the public's trust and confidence," the academy said in a statement. "The inexplicable decision by the U.S. Centers for Disease Control and Prevention to advise against testing individuals who have been exposed to the virus but who are asymptomatic is a dangerous step backward in our efforts to control this deadly virus."

The academy noted that children often show few or no symptoms, but they are not immune to the virus. "Testing exposed individuals who may not yet show symptoms of COVID-19 is crucial to contact tracing, which helps identify and support other people who are at risk of infection," the academy said.