Coronavirus updates: Trump says 'not much' he'd change about COVID response
Thirty-one states are considered in the red zone for new cases in the last week.
A pandemic of the novel coronavirus has now killed more than 1.1 million people worldwide.
Over 40.7 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 8.2 million diagnosed cases and at least 220,955 deaths.
California has the most cases of any U.S. state, with more than 883,000 people diagnosed, according to Johns Hopkins data. California is followed by Texas and Florida, with over 862,000 cases and over 760,000 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.
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More states in 'red zone,' per White House task force
Thirty-one states are considered in the red zone for new cases over the last week, indicating more than 100 new cases per 100,000 population, according to the White House coronavirus task force’s weekly briefing for governors, dated Oct. 18.
This is up from 26 states listed in the red zone in the previous week’s briefing, which was up from 24 states the week before.
Fourteen states and Washington, D.C. are in the orange zone over the last week, indicating between 51 and 100 new cases per 100,000 population.
Five states are in the yellow zone, indicating between 10 and 100 new cases per 100,000 population over the last week.
ABC News' Josh Margolin and Arielle Mitropoulos contributed to this report.
Over 299,000 excess deaths in US this year, two-thirds attributed to COVID-19, says CDC
The official COVID-19 death toll in the U.S. "might underestimate the total impact of the pandemic on mortality," according to a new report from the CDC.
"Overall, an estimated 299,028 excess deaths have occurred in the United States from late January through October 3, 2020, with two thirds of these attributed to COVID-19," the CDC said.
The largest percentage increase in excess deaths was seen in two groups: Hispanic/Latinos and young adults (ages 25-44).
ABC News' Sony Salzman contributed to this report.
Greece reports record rise in cases
Greece is reporting 667 new COVID-19 cases -- the nation's highest one-day rise.
Greece's daily increases may appear to be a fraction compared to its European Union neighbors, but the small Mediterranean nation was widely praised in the beginning of the outbreak for containing the spread through strict lockdowns.
Health Minister Vasilis Kikilias has acknowledged pressure is increasing, and according to local media, there's a fear that a surge in hospitalizations will quickly overwhelm health services.
Greece now has a total of 25,802 COVID-19 cases and at least 520 deaths, according to Johns Hopkins.
ABC News' Christine Theodorou contributed to this report.
Heathrow Airport now offering rapid tests to some passengers
London's Heathrow Airport announced Tuesday that it will now offer a rapid COVID-19 test service for passengers flying to Hong Kong, as a growing list of countries and territories around the world require travelers from the United Kingdom and other "high-risk" places to provide evidence of a negative test result prior to their departure.
The new pre-departure diagnostic tests, a U.K. first, cost 80 pounds (about $104) and aim to provide departing passengers at Heathrow with their results in around 60 minutes. These tests, which include LAMP and Antigen tests, can be processed quickly and without being sent to a laboratory, but aren't as sensitive or reliable as RT-PCR tests.
"Ultimately, we need a common international standard for pre-departure testing, and we welcome the U.K. government's recent announcement that it wants to take a global lead in establishing this," Heathrow CEO John Holland-Kaye said in a statement Tuesday.