Where The Latest COVID-19 Models Think We’re Headed And Why They Disagree – FiveThirtyEight

Posted: May 2, 2020 at 4:20 pm

Models predicting the potential spread of the COVID-19 pandemic have become a fixture of American life. Yet each model tells a different story about the devastation to come, making it hard to know which one is right. But COVID-19 models arent made to be unquestioned oracles. Theyre not trying to tell us one precise future, but rather the range of possibilities given the facts on the ground.

One of their more sober tasks is predicting the number of Americans who will die due to COVID-19. FiveThirtyEight with the help of the Reich Lab at the University of Massachusetts Amherst has assembled six models published by infectious disease researchers to illustrate possible trajectories of the pandemics death toll. In doing so, we hope to make them more accessible, as well as highlight how the assumptions underlying the models can lead to vastly different estimates. Here are the models U.S. fatality projections for the coming weeks.

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TodayMay 1April 21April 14April 7

Forecasts like these are useful because they help us understand the most likely outcomes as well as best- and worst-case possibilities and they can help policymakers make decisions that can lead us closer to those best-case outcomes.

And looking at multiple models is better than looking at just one because it's difficult to know which model will match reality the closest. Even when models disagree, understanding why they are different can give us valuable insight.

Each model makes different assumptions about properties of the novel coronavirus, such as how infectious it is and the rate at which people die once infected. They also use different types of math behind the scenes to make their projections. And perhaps most importantly, they make different assumptions about the amount of contact we should expect between people in the near future.

Understanding the underlying assumptions that each model is currently using can help us understand why some forecasts are more optimistic or pessimistic than others.

Below are individual forecasts for all 50 states and the District of Columbia.

See forecasts from

Forecasts from

TodayMay 1April 21April 14April 7

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AllAlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareDistrict of ColumbiaFloridaGeorgiaHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyoming

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AllColumbia Univ.IHMELos AlamosMITNortheastern Univ.Univ. of Texas

289deathsas ofMay 1

9deaths

330deaths

64deaths

2,126deaths

821deaths

2,339deaths

159deaths

231deaths

1,314deaths

1,169deaths

16deaths

63deaths

2,457deaths

1,175deaths

170deaths

140deaths

246deaths

1,970deaths

55deaths

1,080deaths

3,716deaths

3,866deaths

370deaths

281deaths

360deaths

16deaths

73deaths

246deaths

81deaths

7,538deaths

131deaths

24,039deaths

419deaths

23deaths

1,003deaths

230deaths

104deaths

2,635deaths

279deaths

256deaths

21deaths

204deaths

840deaths

46deaths

50deaths

581deaths

824deaths

46deaths

327deaths

7deaths

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Where The Latest COVID-19 Models Think We're Headed And Why They Disagree - FiveThirtyEight

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