A pandemic of the novel coronavirus has now killed more than 1 million people worldwide.
Over 37.9 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 criteria for diagnosis -- through clinical means or a lab test -- has varied from country-to-country. Still, 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.
Since the first cases were detected in China in December, the virus has rapidly spread to every continent except Antarctica.
The United States is the worst-affected country, with more than 7.8 million diagnosed cases and at least 215,549 deaths.
California has the most cases of any U.S. state, with more than 858,000 people diagnosed, according to Johns Hopkins data. California is followed by Texas and Florida, with over 821,000 cases and over 738,000 cases, respectively.
More than 190 vaccine candidates for COVID-19 are being tracked by the World Health Organization, at least 10 of which are in crucial phase three studies. Of those 10 potential vaccines in late-stage trials, there are currently five that will be available in the United States if approved.
Here's how the news developed today. All times Eastern.
Oct 13, 2020, 3:24 PM EDT
Eli Lilly Phase 3 trial paused for monoclonal antibody COVID-19 treatment
A Phase 3 trial for Eli Lilly's monoclonal antibody COVID-19 treatment has been paused following a potential safety concern.
The trial, called ACTIV-3, is studying Eli Lilly's monoclonal antibody treatment, plus remdesivir, in hospitalized patients.
Monoclonal antibodies are synthetic versions of the natural antibodies made in response to infection.
Eli Lilly said in a statement: "Out of an abundance of caution, the ACTIV-3 independent data safety monitoring board (DSMB) has recommended a pause in enrollment. ... Lilly is supportive of the decision by the independent DSMB to cautiously ensure the safety of the patients participating in this study."
ABC News’ Sony Salzman contributed to this report.
Oct 13, 2020, 11:07 AM EDT
Cristiano Ronaldo tests positive for COVID-19
Cristiano Ronaldo has tested positive for COVID-19, the governing body of soccer in Portugal announced Tuesday.
The 35-year-old Portuguese soccer star is "doing well," doesn't have any symptoms and is currently self-isolating, according to a statement from the Portuguese Football Federation. Due to the positive test result, he will not take part in his country's UEFA Nations League match against Sweden on Wednesday.
Portugal's Cristiano Ronaldo stretches for the ball during the UEFA Nations League soccer match between France and Portugal at the Stade de France in Saint-Denis, north of Paris, France, on Oct. 11, 2020. The Portuguese Football Federation announced on Oct. 13 that Cristiano Ronaldo has tested positive for COVID-19.
Thibault Camus/AP
Following Ronaldo's diagnosis, the remaining players of Portugal's national soccer team were tested for COVID-19 again Tuesday morning and all results came back negative. Portugal coach Fernando Santos will train them Tuesday afternoon at the Cidade do Futebol complex near Lisbon, according to the statement.
Oct 13, 2020, 10:39 AM EDT
Europe reports highest weekly incidence of COVID-19 cases
The World Health Organization said more than 2.2 million new cases of COVID-19 and 39,000 deaths from the disease have been reported across the globe in the past week, the highest number of reported cases so far in a single week since the start of the pandemic.
According to the WHO's weekly epidemiological update published Monday, Europe registered the highest weekly incidence of COVID-19 cases of any region since the start of the pandemic, with almost 700,000 new infections reported. The region's weekly incidence in cases and deaths increased by 34% and 16% respectively in comparison to the previous week. The United Kingdom, France, Russia and Spain account for over half of all new cases reported in the region.
A primary health care worker dressed as the Grim Reaper takes part in a protest in Barcelona, Spain, on Oct. 13, 2020, on the first day of a four-day strike in to demand better working conditions amid the coronavirus pandemic.
Lluis Gene/AFP via Getty Images
Africa reported a substantial rise in deaths from COVID-19, with a 27% increase compared to the previous week. South Africa continues to register more than half of all confirmed cases reported in the region, the WHO said.
Still, nearly half of the world's cases and deaths continue to be reported in the Americas region, with the United States, Brazil and Argentina accounting for the greatest numbers, according to the WHO.
All regions showed an increase in cases during the reporting period, except Southeast Asia. Countries reporting the highest number of cases in the last seven days include India, the United States, Brazil, the United Kingdom and France, the WHO said.
Oct 13, 2020, 8:28 AM EDT
Iowa becomes latest US state to surpass 100,000 cases
Iowa has tallied more than 100,000 positive cases of COVID-19 since the start of the pandemic.
The midwestern U.S. state reached the grim milestone on Monday amid a surge in new cases. More than half of all 50 states have now passed the 100,000 mark.
As of Tuesday morning, the Iowa Department of Public Health had recorded a total of 100,507 positive cases out of 867,124 individuals tested so far, with a positivity rate of 11.6%.
U.S. President Donald Trump is heading to the Hawkeye State, where he will host a campaign rally Wednesday following his recent COVID-19 diagnosis.
