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Health · Guess the stat

How well do you know disease and mortality?

Guess the real numbers behind the world's biggest health killers, see how everyone else guessed, and get the source.

Guess the statOne tap · see how everyone guessed

Ischaemic heart disease is the world's #1 killer. What share of all global deaths did it cause in 2021?

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Guess, see the crowd, get the real number. One ranked attempt per day.

Disease by the numbers

Real figures with their sources. All Disease facts →

about 2.18 million (sum of the 10 listed 2024 causes = 2,179,957; page does not state a single combined total)

About how many total deaths did the top 10 leading causes account for in the US in 2024?

The top 10 causes of death together accounted for roughly 2.4 million deaths in the US.

Source: CDC NCHS FastStats (2024) cdc.gov

about 8.8 million

COVID-19 became the world's #2 cause of death in 2021. About how many people died from it that year?

COVID-19 killed an estimated 8.8 million people worldwide in 2021 alone, per WHO estimates.

Source: World Health Organization (2021) who.int

55,081 deaths

About how many Americans died of kidney disease in 2024?

Kidney disease killed about 55,000 Americans in 2024.

Source: CDC NCHS FastStats (2024) cdc.gov

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How does DiseaseSurvey.com work?

Each question asks you to guess a real number about diseases and the leading causes of death. After you answer you see how everyone else guessed, then the real figure and where it comes from.

How is the daily round scored?

Four stats and one opinion poll. A correct guess earns 100 points plus up to 50 for speed, with a combo bonus for answers in a row. The range next to the right answer earns 40. Opinion polls earn 25 for having your say, and nailing every stat adds 150.

Where do the numbers come from?

Every stat links to its source, such as government statistics agencies, research organizations and industry groups. Figures are checked against the source before they go live.

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