Challenges of COVID-19 Case Forecasting in the US, 2020-2021.

During the COVID-19 pandemic, forecasting COVID-19 trends to support planning and response was a priority for scientists and decision makers alike. In the United States, COVID-19 forecasting was coordinated by a large group of universities, companies, and government entities led by the Centers for D...

Full description

Saved in:
Bibliographic Details
Main Authors: Velma K Lopez, Estee Y Cramer, Robert Pagano, John M Drake, Eamon B O'Dea, Madeline Adee, Turgay Ayer, Jagpreet Chhatwal, Ozden O Dalgic, Mary A Ladd, Benjamin P Linas, Peter P Mueller, Jade Xiao, Johannes Bracher, Alvaro J Castro Rivadeneira, Aaron Gerding, Tilmann Gneiting, Yuxin Huang, Dasuni Jayawardena, Abdul H Kanji, Khoa Le, Anja Mühlemann, Jarad Niemi, Evan L Ray, Ariane Stark, Yijin Wang, Nutcha Wattanachit, Martha W Zorn, Sen Pei, Jeffrey Shaman, Teresa K Yamana, Samuel R Tarasewicz, Daniel J Wilson, Sid Baccam, Heidi Gurung, Steve Stage, Brad Suchoski, Lei Gao, Zhiling Gu, Myungjin Kim, Xinyi Li, Guannan Wang, Lily Wang, Yueying Wang, Shan Yu, Lauren Gardner, Sonia Jindal, Maximilian Marshall, Kristen Nixon, Juan Dent, Alison L Hill, Joshua Kaminsky, Elizabeth C Lee, Joseph C Lemaitre, Justin Lessler, Claire P Smith, Shaun Truelove, Matt Kinsey, Luke C Mullany, Kaitlin Rainwater-Lovett, Lauren Shin, Katharine Tallaksen, Shelby Wilson, Dean Karlen, Lauren Castro, Geoffrey Fairchild, Isaac Michaud, Dave Osthus, Jiang Bian, Wei Cao, Zhifeng Gao, Juan Lavista Ferres, Chaozhuo Li, Tie-Yan Liu, Xing Xie, Shun Zhang, Shun Zheng, Matteo Chinazzi, Jessica T Davis, Kunpeng Mu, Ana Pastore Y Piontti, Alessandro Vespignani, Xinyue Xiong, Robert Walraven, Jinghui Chen, Quanquan Gu, Lingxiao Wang, Pan Xu, Weitong Zhang, Difan Zou, Graham Casey Gibson, Daniel Sheldon, Ajitesh Srivastava, Aniruddha Adiga, Benjamin Hurt, Gursharn Kaur, Bryan Lewis, Madhav Marathe, Akhil Sai Peddireddy, Przemyslaw Porebski, Srinivasan Venkatramanan, Lijing Wang, Pragati V Prasad, Jo W Walker, Alexander E Webber, Rachel B Slayton, Matthew Biggerstaff, Nicholas G Reich, Michael A Johansson
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2024-05-01
Series:PLoS Computational Biology
Online Access:https://doi.org/10.1371/journal.pcbi.1011200
Tags: Add Tag
No Tags, Be the first to tag this record!
_version_ 1850128186274217984
author Velma K Lopez
Estee Y Cramer
Robert Pagano
John M Drake
Eamon B O'Dea
Madeline Adee
Turgay Ayer
Jagpreet Chhatwal
Ozden O Dalgic
Mary A Ladd
Benjamin P Linas
Peter P Mueller
Jade Xiao
Johannes Bracher
Alvaro J Castro Rivadeneira
Aaron Gerding
Tilmann Gneiting
Yuxin Huang
Dasuni Jayawardena
Abdul H Kanji
Khoa Le
Anja Mühlemann
Jarad Niemi
Evan L Ray
Ariane Stark
Yijin Wang
Nutcha Wattanachit
Martha W Zorn
Sen Pei
Jeffrey Shaman
Teresa K Yamana
Samuel R Tarasewicz
Daniel J Wilson
Sid Baccam
Heidi Gurung
Steve Stage
Brad Suchoski
Lei Gao
Zhiling Gu
Myungjin Kim
Xinyi Li
Guannan Wang
Lily Wang
Yueying Wang
Shan Yu
Lauren Gardner
Sonia Jindal
Maximilian Marshall
Kristen Nixon
Juan Dent
Alison L Hill
Joshua Kaminsky
Elizabeth C Lee
Joseph C Lemaitre
Justin Lessler
Claire P Smith
Shaun Truelove
Matt Kinsey
Luke C Mullany
Kaitlin Rainwater-Lovett
Lauren Shin
Katharine Tallaksen
Shelby Wilson
Dean Karlen
Lauren Castro
Geoffrey Fairchild
Isaac Michaud
Dave Osthus
Jiang Bian
Wei Cao
Zhifeng Gao
Juan Lavista Ferres
Chaozhuo Li
Tie-Yan Liu
Xing Xie
Shun Zhang
Shun Zheng
Matteo Chinazzi
Jessica T Davis
Kunpeng Mu
Ana Pastore Y Piontti
Alessandro Vespignani
Xinyue Xiong
Robert Walraven
Jinghui Chen
Quanquan Gu
Lingxiao Wang
Pan Xu
Weitong Zhang
Difan Zou
Graham Casey Gibson
Daniel Sheldon
Ajitesh Srivastava
Aniruddha Adiga
Benjamin Hurt
Gursharn Kaur
Bryan Lewis
Madhav Marathe
Akhil Sai Peddireddy
Przemyslaw Porebski
Srinivasan Venkatramanan
Lijing Wang
Pragati V Prasad
Jo W Walker
Alexander E Webber
Rachel B Slayton
Matthew Biggerstaff
Nicholas G Reich
Michael A Johansson
author_facet Velma K Lopez
Estee Y Cramer
Robert Pagano
John M Drake
Eamon B O'Dea
Madeline Adee
Turgay Ayer
Jagpreet Chhatwal
Ozden O Dalgic
Mary A Ladd
Benjamin P Linas
Peter P Mueller
Jade Xiao
Johannes Bracher
Alvaro J Castro Rivadeneira
Aaron Gerding
Tilmann Gneiting
Yuxin Huang
Dasuni Jayawardena
Abdul H Kanji
Khoa Le
Anja Mühlemann
Jarad Niemi
Evan L Ray
Ariane Stark
Yijin Wang
Nutcha Wattanachit
Martha W Zorn
Sen Pei
Jeffrey Shaman
Teresa K Yamana
Samuel R Tarasewicz
Daniel J Wilson
Sid Baccam
Heidi Gurung
Steve Stage
Brad Suchoski
Lei Gao
Zhiling Gu
Myungjin Kim
Xinyi Li
Guannan Wang
Lily Wang
Yueying Wang
Shan Yu
Lauren Gardner
Sonia Jindal
Maximilian Marshall
Kristen Nixon
Juan Dent
Alison L Hill
Joshua Kaminsky
Elizabeth C Lee
Joseph C Lemaitre
Justin Lessler
Claire P Smith
Shaun Truelove
Matt Kinsey
Luke C Mullany
Kaitlin Rainwater-Lovett
Lauren Shin
Katharine Tallaksen
Shelby Wilson
Dean Karlen
Lauren Castro
Geoffrey Fairchild
Isaac Michaud
Dave Osthus
Jiang Bian
Wei Cao
Zhifeng Gao
Juan Lavista Ferres
Chaozhuo Li
Tie-Yan Liu
Xing Xie
Shun Zhang
Shun Zheng
Matteo Chinazzi
Jessica T Davis
Kunpeng Mu
Ana Pastore Y Piontti
Alessandro Vespignani
Xinyue Xiong
Robert Walraven
Jinghui Chen
Quanquan Gu
Lingxiao Wang
Pan Xu
Weitong Zhang
Difan Zou
Graham Casey Gibson
Daniel Sheldon
Ajitesh Srivastava
Aniruddha Adiga
Benjamin Hurt
Gursharn Kaur
Bryan Lewis
Madhav Marathe
Akhil Sai Peddireddy
Przemyslaw Porebski
Srinivasan Venkatramanan
Lijing Wang
Pragati V Prasad
Jo W Walker
Alexander E Webber
Rachel B Slayton
Matthew Biggerstaff
Nicholas G Reich
Michael A Johansson
author_sort Velma K Lopez
collection DOAJ
description During the COVID-19 pandemic, forecasting COVID-19 trends to support planning and response was a priority for scientists and decision makers alike. In the United States, COVID-19 forecasting was coordinated by a large group of universities, companies, and government entities led by the Centers for Disease Control and Prevention and the US COVID-19 Forecast Hub (https://covid19forecasthub.org). We evaluated approximately 9.7 million forecasts of weekly state-level COVID-19 cases for predictions 1-4 weeks into the future submitted by 24 teams from August 2020 to December 2021. We assessed coverage of central prediction intervals and weighted interval scores (WIS), adjusting for missing forecasts relative to a baseline forecast, and used a Gaussian generalized estimating equation (GEE) model to evaluate differences in skill across epidemic phases that were defined by the effective reproduction number. Overall, we found high variation in skill across individual models, with ensemble-based forecasts outperforming other approaches. Forecast skill relative to the baseline was generally higher for larger jurisdictions (e.g., states compared to counties). Over time, forecasts generally performed worst in periods of rapid changes in reported cases (either in increasing or decreasing epidemic phases) with 95% prediction interval coverage dropping below 50% during the growth phases of the winter 2020, Delta, and Omicron waves. Ideally, case forecasts could serve as a leading indicator of changes in transmission dynamics. However, while most COVID-19 case forecasts outperformed a naïve baseline model, even the most accurate case forecasts were unreliable in key phases. Further research could improve forecasts of leading indicators, like COVID-19 cases, by leveraging additional real-time data, addressing performance across phases, improving the characterization of forecast confidence, and ensuring that forecasts were coherent across spatial scales. In the meantime, it is critical for forecast users to appreciate current limitations and use a broad set of indicators to inform pandemic-related decision making.
format Article
id doaj-art-d7c7eeeba3c3436d9f9bb67e5878ebf7
institution OA Journals
issn 1553-734X
1553-7358
language English
publishDate 2024-05-01
publisher Public Library of Science (PLoS)
record_format Article
series PLoS Computational Biology
spelling doaj-art-d7c7eeeba3c3436d9f9bb67e5878ebf72025-08-20T02:33:26ZengPublic Library of Science (PLoS)PLoS Computational Biology1553-734X1553-73582024-05-01205e101120010.1371/journal.pcbi.1011200Challenges of COVID-19 Case Forecasting in the US, 2020-2021.Velma K LopezEstee Y CramerRobert PaganoJohn M DrakeEamon B O'DeaMadeline AdeeTurgay AyerJagpreet ChhatwalOzden O DalgicMary A LaddBenjamin P LinasPeter P MuellerJade XiaoJohannes BracherAlvaro J Castro RivadeneiraAaron GerdingTilmann GneitingYuxin HuangDasuni JayawardenaAbdul H KanjiKhoa LeAnja MühlemannJarad NiemiEvan L RayAriane StarkYijin WangNutcha WattanachitMartha W ZornSen PeiJeffrey ShamanTeresa K YamanaSamuel R TarasewiczDaniel J WilsonSid BaccamHeidi GurungSteve StageBrad SuchoskiLei GaoZhiling GuMyungjin KimXinyi LiGuannan WangLily WangYueying WangShan YuLauren GardnerSonia JindalMaximilian MarshallKristen NixonJuan DentAlison L HillJoshua KaminskyElizabeth C LeeJoseph C LemaitreJustin LesslerClaire P SmithShaun TrueloveMatt KinseyLuke C MullanyKaitlin Rainwater-LovettLauren ShinKatharine TallaksenShelby WilsonDean KarlenLauren CastroGeoffrey FairchildIsaac MichaudDave OsthusJiang BianWei CaoZhifeng GaoJuan Lavista FerresChaozhuo LiTie-Yan LiuXing XieShun ZhangShun ZhengMatteo ChinazziJessica T DavisKunpeng MuAna Pastore Y PionttiAlessandro VespignaniXinyue XiongRobert WalravenJinghui ChenQuanquan GuLingxiao WangPan XuWeitong ZhangDifan ZouGraham Casey GibsonDaniel SheldonAjitesh SrivastavaAniruddha AdigaBenjamin HurtGursharn KaurBryan LewisMadhav MaratheAkhil Sai PeddireddyPrzemyslaw PorebskiSrinivasan VenkatramananLijing WangPragati V PrasadJo W WalkerAlexander E WebberRachel B SlaytonMatthew BiggerstaffNicholas G ReichMichael A JohanssonDuring the COVID-19 pandemic, forecasting COVID-19 trends to support planning and response was a priority for scientists and decision makers alike. In the United States, COVID-19 forecasting was coordinated by a large group of universities, companies, and government entities led by the Centers for Disease Control and Prevention and the US COVID-19 Forecast Hub (https://covid19forecasthub.org). We evaluated approximately 9.7 million forecasts of weekly state-level COVID-19 cases for predictions 1-4 weeks into the future submitted by 24 teams from August 2020 to December 2021. We assessed coverage of central prediction intervals and weighted interval scores (WIS), adjusting for missing forecasts relative to a baseline forecast, and used a Gaussian generalized estimating equation (GEE) model to evaluate differences in skill across epidemic phases that were defined by the effective reproduction number. Overall, we found high variation in skill across individual models, with ensemble-based forecasts outperforming other approaches. Forecast skill relative to the baseline was generally higher for larger jurisdictions (e.g., states compared to counties). Over time, forecasts generally performed worst in periods of rapid changes in reported cases (either in increasing or decreasing epidemic phases) with 95% prediction interval coverage dropping below 50% during the growth phases of the winter 2020, Delta, and Omicron waves. Ideally, case forecasts could serve as a leading indicator of changes in transmission dynamics. However, while most COVID-19 case forecasts outperformed a naïve baseline model, even the most accurate case forecasts were unreliable in key phases. Further research could improve forecasts of leading indicators, like COVID-19 cases, by leveraging additional real-time data, addressing performance across phases, improving the characterization of forecast confidence, and ensuring that forecasts were coherent across spatial scales. In the meantime, it is critical for forecast users to appreciate current limitations and use a broad set of indicators to inform pandemic-related decision making.https://doi.org/10.1371/journal.pcbi.1011200
spellingShingle Velma K Lopez
Estee Y Cramer
Robert Pagano
John M Drake
Eamon B O'Dea
Madeline Adee
Turgay Ayer
Jagpreet Chhatwal
Ozden O Dalgic
Mary A Ladd
Benjamin P Linas
Peter P Mueller
Jade Xiao
Johannes Bracher
Alvaro J Castro Rivadeneira
Aaron Gerding
Tilmann Gneiting
Yuxin Huang
Dasuni Jayawardena
Abdul H Kanji
Khoa Le
Anja Mühlemann
Jarad Niemi
Evan L Ray
Ariane Stark
Yijin Wang
Nutcha Wattanachit
Martha W Zorn
Sen Pei
Jeffrey Shaman
Teresa K Yamana
Samuel R Tarasewicz
Daniel J Wilson
Sid Baccam
Heidi Gurung
Steve Stage
Brad Suchoski
Lei Gao
Zhiling Gu
Myungjin Kim
Xinyi Li
Guannan Wang
Lily Wang
Yueying Wang
Shan Yu
Lauren Gardner
Sonia Jindal
Maximilian Marshall
Kristen Nixon
Juan Dent
Alison L Hill
Joshua Kaminsky
Elizabeth C Lee
Joseph C Lemaitre
Justin Lessler
Claire P Smith
Shaun Truelove
Matt Kinsey
Luke C Mullany
Kaitlin Rainwater-Lovett
Lauren Shin
Katharine Tallaksen
Shelby Wilson
Dean Karlen
Lauren Castro
Geoffrey Fairchild
Isaac Michaud
Dave Osthus
Jiang Bian
Wei Cao
Zhifeng Gao
Juan Lavista Ferres
Chaozhuo Li
Tie-Yan Liu
Xing Xie
Shun Zhang
Shun Zheng
Matteo Chinazzi
Jessica T Davis
Kunpeng Mu
Ana Pastore Y Piontti
Alessandro Vespignani
Xinyue Xiong
Robert Walraven
Jinghui Chen
Quanquan Gu
Lingxiao Wang
Pan Xu
Weitong Zhang
Difan Zou
Graham Casey Gibson
Daniel Sheldon
Ajitesh Srivastava
Aniruddha Adiga
Benjamin Hurt
Gursharn Kaur
Bryan Lewis
Madhav Marathe
Akhil Sai Peddireddy
Przemyslaw Porebski
Srinivasan Venkatramanan
Lijing Wang
Pragati V Prasad
Jo W Walker
Alexander E Webber
Rachel B Slayton
Matthew Biggerstaff
Nicholas G Reich
Michael A Johansson
Challenges of COVID-19 Case Forecasting in the US, 2020-2021.
PLoS Computational Biology
title Challenges of COVID-19 Case Forecasting in the US, 2020-2021.
title_full Challenges of COVID-19 Case Forecasting in the US, 2020-2021.
title_fullStr Challenges of COVID-19 Case Forecasting in the US, 2020-2021.
title_full_unstemmed Challenges of COVID-19 Case Forecasting in the US, 2020-2021.
title_short Challenges of COVID-19 Case Forecasting in the US, 2020-2021.
title_sort challenges of covid 19 case forecasting in the us 2020 2021
url https://doi.org/10.1371/journal.pcbi.1011200
work_keys_str_mv AT velmaklopez challengesofcovid19caseforecastingintheus20202021
AT esteeycramer challengesofcovid19caseforecastingintheus20202021
AT robertpagano challengesofcovid19caseforecastingintheus20202021
AT johnmdrake challengesofcovid19caseforecastingintheus20202021
AT eamonbodea challengesofcovid19caseforecastingintheus20202021
AT madelineadee challengesofcovid19caseforecastingintheus20202021
AT turgayayer challengesofcovid19caseforecastingintheus20202021
AT jagpreetchhatwal challengesofcovid19caseforecastingintheus20202021
AT ozdenodalgic challengesofcovid19caseforecastingintheus20202021
AT maryaladd challengesofcovid19caseforecastingintheus20202021
AT benjaminplinas challengesofcovid19caseforecastingintheus20202021
AT peterpmueller challengesofcovid19caseforecastingintheus20202021
AT jadexiao challengesofcovid19caseforecastingintheus20202021
AT johannesbracher challengesofcovid19caseforecastingintheus20202021
AT alvarojcastrorivadeneira challengesofcovid19caseforecastingintheus20202021
AT aarongerding challengesofcovid19caseforecastingintheus20202021
AT tilmanngneiting challengesofcovid19caseforecastingintheus20202021
AT yuxinhuang challengesofcovid19caseforecastingintheus20202021
AT dasunijayawardena challengesofcovid19caseforecastingintheus20202021
AT abdulhkanji challengesofcovid19caseforecastingintheus20202021
AT khoale challengesofcovid19caseforecastingintheus20202021
AT anjamuhlemann challengesofcovid19caseforecastingintheus20202021
AT jaradniemi challengesofcovid19caseforecastingintheus20202021
AT evanlray challengesofcovid19caseforecastingintheus20202021
AT arianestark challengesofcovid19caseforecastingintheus20202021
AT yijinwang challengesofcovid19caseforecastingintheus20202021
AT nutchawattanachit challengesofcovid19caseforecastingintheus20202021
AT marthawzorn challengesofcovid19caseforecastingintheus20202021
AT senpei challengesofcovid19caseforecastingintheus20202021
AT jeffreyshaman challengesofcovid19caseforecastingintheus20202021
AT teresakyamana challengesofcovid19caseforecastingintheus20202021
AT samuelrtarasewicz challengesofcovid19caseforecastingintheus20202021
AT danieljwilson challengesofcovid19caseforecastingintheus20202021
AT sidbaccam challengesofcovid19caseforecastingintheus20202021
AT heidigurung challengesofcovid19caseforecastingintheus20202021
AT stevestage challengesofcovid19caseforecastingintheus20202021
AT bradsuchoski challengesofcovid19caseforecastingintheus20202021
AT leigao challengesofcovid19caseforecastingintheus20202021
AT zhilinggu challengesofcovid19caseforecastingintheus20202021
AT myungjinkim challengesofcovid19caseforecastingintheus20202021
AT xinyili challengesofcovid19caseforecastingintheus20202021
AT guannanwang challengesofcovid19caseforecastingintheus20202021
AT lilywang challengesofcovid19caseforecastingintheus20202021
AT yueyingwang challengesofcovid19caseforecastingintheus20202021
AT shanyu challengesofcovid19caseforecastingintheus20202021
AT laurengardner challengesofcovid19caseforecastingintheus20202021
AT soniajindal challengesofcovid19caseforecastingintheus20202021
AT maximilianmarshall challengesofcovid19caseforecastingintheus20202021
AT kristennixon challengesofcovid19caseforecastingintheus20202021
AT juandent challengesofcovid19caseforecastingintheus20202021
AT alisonlhill challengesofcovid19caseforecastingintheus20202021
AT joshuakaminsky challengesofcovid19caseforecastingintheus20202021
AT elizabethclee challengesofcovid19caseforecastingintheus20202021
AT josephclemaitre challengesofcovid19caseforecastingintheus20202021
AT justinlessler challengesofcovid19caseforecastingintheus20202021
AT clairepsmith challengesofcovid19caseforecastingintheus20202021
AT shauntruelove challengesofcovid19caseforecastingintheus20202021
AT mattkinsey challengesofcovid19caseforecastingintheus20202021
AT lukecmullany challengesofcovid19caseforecastingintheus20202021
AT kaitlinrainwaterlovett challengesofcovid19caseforecastingintheus20202021
AT laurenshin challengesofcovid19caseforecastingintheus20202021
AT katharinetallaksen challengesofcovid19caseforecastingintheus20202021
AT shelbywilson challengesofcovid19caseforecastingintheus20202021
AT deankarlen challengesofcovid19caseforecastingintheus20202021
AT laurencastro challengesofcovid19caseforecastingintheus20202021
AT geoffreyfairchild challengesofcovid19caseforecastingintheus20202021
AT isaacmichaud challengesofcovid19caseforecastingintheus20202021
AT daveosthus challengesofcovid19caseforecastingintheus20202021
AT jiangbian challengesofcovid19caseforecastingintheus20202021
AT weicao challengesofcovid19caseforecastingintheus20202021
AT zhifenggao challengesofcovid19caseforecastingintheus20202021
AT juanlavistaferres challengesofcovid19caseforecastingintheus20202021
AT chaozhuoli challengesofcovid19caseforecastingintheus20202021
AT tieyanliu challengesofcovid19caseforecastingintheus20202021
AT xingxie challengesofcovid19caseforecastingintheus20202021
AT shunzhang challengesofcovid19caseforecastingintheus20202021
AT shunzheng challengesofcovid19caseforecastingintheus20202021
AT matteochinazzi challengesofcovid19caseforecastingintheus20202021
AT jessicatdavis challengesofcovid19caseforecastingintheus20202021
AT kunpengmu challengesofcovid19caseforecastingintheus20202021
AT anapastoreypiontti challengesofcovid19caseforecastingintheus20202021
AT alessandrovespignani challengesofcovid19caseforecastingintheus20202021
AT xinyuexiong challengesofcovid19caseforecastingintheus20202021
AT robertwalraven challengesofcovid19caseforecastingintheus20202021
AT jinghuichen challengesofcovid19caseforecastingintheus20202021
AT quanquangu challengesofcovid19caseforecastingintheus20202021
AT lingxiaowang challengesofcovid19caseforecastingintheus20202021
AT panxu challengesofcovid19caseforecastingintheus20202021
AT weitongzhang challengesofcovid19caseforecastingintheus20202021
AT difanzou challengesofcovid19caseforecastingintheus20202021
AT grahamcaseygibson challengesofcovid19caseforecastingintheus20202021
AT danielsheldon challengesofcovid19caseforecastingintheus20202021
AT ajiteshsrivastava challengesofcovid19caseforecastingintheus20202021
AT aniruddhaadiga challengesofcovid19caseforecastingintheus20202021
AT benjaminhurt challengesofcovid19caseforecastingintheus20202021
AT gursharnkaur challengesofcovid19caseforecastingintheus20202021
AT bryanlewis challengesofcovid19caseforecastingintheus20202021
AT madhavmarathe challengesofcovid19caseforecastingintheus20202021
AT akhilsaipeddireddy challengesofcovid19caseforecastingintheus20202021
AT przemyslawporebski challengesofcovid19caseforecastingintheus20202021
AT srinivasanvenkatramanan challengesofcovid19caseforecastingintheus20202021
AT lijingwang challengesofcovid19caseforecastingintheus20202021
AT pragativprasad challengesofcovid19caseforecastingintheus20202021
AT jowwalker challengesofcovid19caseforecastingintheus20202021
AT alexanderewebber challengesofcovid19caseforecastingintheus20202021
AT rachelbslayton challengesofcovid19caseforecastingintheus20202021
AT matthewbiggerstaff challengesofcovid19caseforecastingintheus20202021
AT nicholasgreich challengesofcovid19caseforecastingintheus20202021
AT michaelajohansson challengesofcovid19caseforecastingintheus20202021