Coronavirus updates: UNC-Chapel Hill has 4th cluster of cases in 3 days

The clusters were found in three residence halls and one fraternity.

ABC News- The novel coronavirus has now killed more than 768,000 people worldwide.

More than 21.3 million people across the globe have been diagnosed with COVID-19, the disease caused by the new respiratory virus, according to data compiled by the Center for Systems Science and Engineering at Johns Hopkins University. The actual numbers are believed to be much higher due to testing shortages, many unreported cases and suspicions that some national governments are hiding or downplaying the scope of their outbreaks.

The United States is the worst-affected country in the world, with more than 5.3 million diagnosed cases and at least 169,423 deaths.