Coronavirus updates: University suspends students over growing cluster of cases

Responding to claims that a vaccine could be ready by the end of October, Dr. Anthony Fauci would not commit to a specific date, calling any projection of when it would be available a "guesstimate."

"If you look at the projections of the enrollment and the kinds of things you'll need to get a decision about whether a vaccine is safe and effective, most of us project that that's going to be by November and December, by the end of the year," Fauci told CNN in an interview on Thursday.

When asked about the possibility of a vaccine being ready by October, Fauci called it "unlikely, not impossible."

Fauci, the director of the National Institute of Allergy and Infectious Diseases, said he doesn't think Americans should be concerned that politics will influence when a vaccine would be approved for the public.

"The FDA has been very explicit that they are going to make a decision based on the data as it comes in," he said.

Fauci says once approved, he would not hesitate to take a coronavirus vaccine.

"A vaccine would not be approved for the American public unless it was both indeed safe and effective," he said.

ABC News' Stephanie Ebbs contributed to this report.

Malls in New York City can reopen at 50% capacity on Sept. 9, Gov. Andrew Cuomo announced on Thursday.

The malls must have enhanced filtration systems and additional staff will be required to help control foot traffic.

There will still be no indoor dining in the malls, Cuomo said. The governor would not commit to when indoor dining would resume in New York City.

"My opinion is restaurants should open. The question is how?" he said.

Casinos in the state have also been authorized to reopen on Sept. 9 at 25% capacity -- they must also have a filtration system in place and occupants must follow social distancing guidelines.

Cuomo was also asked about a letter the CDC sent to states telling them to prepare for a vaccine by Nov. 1. The governor said the state's Department of Health would review all the protocols and research before recommending any New Yorkers take a vaccine.

"The President says he's going to have a vaccine -- the CDC is talking about a vaccine in early November. How convenient. It's going to be an Election Day miracle," Cuomo said.

Temple University announced on Thursday it will now have virtual learning for the entire fall semester after a rise in cases among students at the school.

"In light of the recent increase in positive test results among our students, and after consultation with our own healthcare professionals and leaders at the Philadelphia Department of Public Health, we have concluded that the data indicate it is time to pivot to primarily online education," university President Richard Englert said in a statement.

Only "essential in-person teaching" at the university's domestic campuses will continue for the rest of the fall semester -- this applies only to courses where "educational objectives" cannot be reached without some in-person instruction.

The university estimated that 95% of classes would become virtual.

Any student that is using university housing and chooses to leave by Sept. 13 will be given a full refund for housing and meal plan charges for the semester. Students who wish to remain in university housing may do so, the school said.

The University of Georgia reported that more than 800 people on campus have tested positive for COVID-19. Data released Wednesday showed that 798 students, 19 staff members and four faculty members tested positive following the first week of classes.

"The rise in positive tests last week is concerning. It is critically important that all of our students continue to make every effort to prioritize their health and safety by taking the proper steps to avoid exposure to this virus," UGA President Jere W. Morehead said in a statement Wednesday. "... And, for those of you heading out of town over the Labor Day weekend, be very careful and think about the health of everyone around you. All of us must take our responsibilities very seriously as we seek to reduce the spread of COVID-19."

One professor at UGA said while the number of confirmed diagnosed cases is concerning, he believes the true numbers could be much higher.

Dr. Mark Ebell, an epidemiology professor at UGA, told ABC affiliate WSB in Atlanta that he believes, based on test data, that another 2,000 asymptomatic students could be on campus right now.

He said those who tested positive are those "who had a cough, fever and knew they were sick and reported the diseases."

The state of Georgia has more than 274,000 diagnosed cases of coronavirus, with at least 5,795 deaths.

Colleges and universities throughout the country are seeing a rise in cases and students come back to campus. At the University of Indiana, 30 Greek Houses, which have over 1,000 students, have been told to quarantine due to COVID-19.