The COVID‑19 Portal is a resource for researchers, policymakers, and the public that provides tracking, modeling, and analysis of the ongoing COVID‑19 pandemic.

Center for the Ecology of Infectious Diseases  (CEID) Coronavirus Working Group
in partnership with the College of  Public Health
University of Georgia

News & Updates
Information for UGA students and staff:

Forecast for U.S. States

To better understand the potential range of epidemic outcomes in each U.S. State, we developed a stochastic model incorporating regionally specific conditions and calibrated to reported cases and deaths. We explore three social distancing scenarios ranging from increased social distancing to a complete return to normal. The model uses social distancing data and also captures hard-to-measure human behaviors such as wearing facemasks in public. The figure shown here compares three scenarios in four states.

Explore all U.S. States →

Wastewater surveillance in Athens, GA

Full Details →

To better understand the outbreak of COVID‑19 on a local level, we are monitoring wastewater samples from water reclamation facilities in Athens, Georgia. Wastewater surveillance is an emerging tool for monitoring disease outbreaks. Coupled with clinical surveillance, it can be used to estimate the level of viruses circulating in local population. Samples are collected weekly and tested to detect the disease-causing virus, SARS‑CoV‑2. Taken together with clinical surveillance, wastewater surveillance is intended to inform public health decisions.

Protecting against airborne transmission of COVID‑19

September 4, 2020 | by John M. Drake |

This is the second part of a discussion about airborne transmission of COVID‑19. The piece considers how to protect against airborne transmission and what it might mean for the epidemiology of COVID‑19. Read online at

Risky work: SARS-‑CoV‑2 Infections Among Frontline Health Care Workers

September 1, 2020 | by John M. Drake |

A recent CDC report quantifies the risk of infection for health care workers caring for COVID‑19 patients. Read a discussion by John Drake at

Is COVID‑19 airborne?

August 31, 2020 | by John M. Drake |

John Drake discusses the evidence for airborne transmission of SARS‑CoV‑2 at

Two studies show how to control the spread of coronavirus

August 28, 2020 | by John M. Drake |

Two recent CDC reports document the dsuccessful use of “bubbles” for containing local spread of COVID‑19. CEID Director John drake discusses the findings at

The science behind campus coronavirus outbreaks

August 21, 2020 | by John M. Drake |

John Drake discusses COVID‑19 on College Campuses and the Science of Epidemics Among College Students. Read the complete column at

The science of reopening: Can testing students work?

August 17, 2020 | by John M. Drake |

As universities across the nation reopen, CEID Director John Drake discusses testing programs instituted by various universities, as well as models developped at Yale and elsewhere to assess the effectiveness of these programs. Read the complete column at

Five approaches to the suppression of SARS‑CoV‑2
without intensive social distancing

August 3, 2020

CEID researchers have modeled the effectiveness of generalized and targeted non-pharmaceutical interventions in controling the spread of SARS‑CoV‑2. Generalized policies include limiting large gatherings, wearing face masks, hand washing, enhanced sick leave policies, limiting large gatherings, and other behavioral changes not involving intensive social distancing or shelter-in-place orders. Targeted methods include active case finding, contact tracing, immunity certification, and quarantine. Because non-pharmaceutical policies have disrupted local and state economies, understanding the effectiveness of less disruptive interventions to control SARS‑CoV‑2 is increasingly important. Researchers developed two modeling frameworks to study the effectiveness of targeted strategies in combination with generalized interventions. Results indicated that the four targeted interventions studied are effective. However, generalized methods such as wearing a face mask and reduced densities were determined to significantly improve the effectiveness of targeted interventions.

See for complete details and a link to the preprint.

Surge in deaths associated with COVID‑19

July 18, 2020 | by John M. Drake |

COVID‑19 deaths have now begun to surge following the earlier surge in case reports. John Drake discusses the ten-day average lag between case reporting and deaths and what it means for predicting daily deaths in the near future. Using the lagged Case Fatality Rate (deaths today over cases reported ten days ago), the number of of deaths over the next ten days can be estimated from daily case reports over the previous ten days. For the US, Drake predicts new deaths will hover around 1000 per day, ±500. Read the complete column at

Four reasons why coronavirus cases are increasing
but deaths aren’t—yet

July 8, 2020 | by John M. Drake |

John Drake discusses the discrepancy between numbers of COVID‑19 cases and deaths in the current resurgence of COVID‑19. Drake explores four possible explanations: time lag, improved treatment, increased testing, and changing age distribution. Read the complete column at

John Drake joins as a contributor

July 7, 2020

CEID director John Drake has joined as a contributor. His column will address general infectious disease ecology and epidemiology, as well as COVID‑19. Read his introductory column: Why Ecologists Study Infectious Diseases And What We Can Learn About Public Health By Studying Nature, published July 7.

Op-ed in The Hill by CEID Director John Drake

America needs a national center for infectious disease intelligence
June 21, 2020 | by John M. Drake | The Hill

In an opinion piece published in The Hill, CEID Director John Drake made the case that the time is now to establish a national center for infectious disease intelligence to monitor trends and provide real-time interpretation of outbreak data through modeling, biostatistics, and data science.

Read the complete opinion at

John Drake on “Debriefing the Briefing” with Major Garrett

May 7, 2020

CEID Director John Drake discusses how COVID‑19 modeling informs public policy and mitigation efforts on Debriefing the Briefing with CBS News Washington Correspondent Major Garrett.

Listen the podcast here.

John Drake feature article on FiveThirtyEight

Why One Expert Is Still Making COVID‑19 Models, Despite The Uncertainty
April 17, 2020 | by John M. Drake |

Read the full article on

New tracker for cases, deaths and hospitalizations

The Center for the Ecology of Infectious Diseases (CEID) and the College of Public Health (CPH) at UGA have created a new interactive tracker that allows users to track the spread of COVID‑19 both in the US and worldwide. The tracker allows users to explore cases, hospitalizations, deaths and number of tests for every US state, as well as cases and deaths worldwide. Users can adjust the plots by choosing total or daily numbers, absolute or normalized values, and calendar date versus date since a certain number of cases occurred. The data comes from the Covid Tracking Project and the Johns Hopkins University Center for Systems Science and Engineering.

Op-ed by CEID Director John Drake

Dr. John Drake urges swift, decisive action to curb spread of COVID‑19.

In an op-ed in the Atlanta Journal-Constitution, CEID Director Dr. John Drake has called for immediate and decisive intervention to slow the spread of COVID‑19. Based on a study of government intervention in China following the initial outbreak of COVID‑19 in Wuhan, CEID researchers found a very strong correlation (90%) between how early a major intervention was imposed in a province and the ultimate severity of the outbreak there. The results show that early action yields critical gains, with every delay of 3.8 days leading to a tenfold increase in cases.

Opinion: Now’s the time to act on coronavirus. Guest column. Atlanta Journal-Constitution, March 13, 2020

Latest Updates

CEID’s stochastic forecast model released

September 22, 2020
CEID has released its stochastic model for the US. The model takes into account human actions that are difficult to quantify (e.g., wearing of face masks), in addition to human mobility quantified through cell phone data. The new model fits reported cases, deaths, movement data, and a temporal trend in transmission capturing other human behaviors. The model projects cases, hospitalizations and deaths six weeks out under three social distancing scenarios.

CEID’s statistical model on COVID‑19 ForecastHub

August 31, 2020
CEID’s statistical forecasting model is now included on the COVID‑19 ForecastHub, a CDC-coordinated record and visualization of forecasts by modeling teams from around the globe. All forecasts on the ForecastHub are updated weekly. Information about the model (referred to on ForecastHub as “CEID-Walk”) can be found here.

Importation risk

August 30, 2020
CEID researchers have produced a model of the risk of COVID‑19 importation via each US port-of-entry airport, and the risk of imporation to the US from each country currently flying to the US. Results are updated monthly on the COVID‑19 Portal here

Wastewater surveillance

August 25, 2020
UGA’s College of Public Health is now monitoring wastewater samples from reclamation facilities in Athens, Georgia, in order to help anticipate outbreaks and estimate the level of SARS‑CoV‑2 circulating in the population. Results are updated weekly on the COVID‑19 Portal here

Model for university reopening

August 15, 2020
COVID‑19 Portal now includes a model for SARS‑CoV‑2 transmission on a university campus. The model estimated imported cases at the start of a semester and considers both generalized interventions and testing programs. Model details here

Tracking US county-level COVID‑19 cases and deaths

June 11, 2020
CEID’s COVID‑19 Tracker has been updated to include cases and deaths at the county level for each US state.

Behavioral stochastic model for Georgia

June 2, 2020
CEID’s updated stochastic model for the COVID‑19 outbreak in Georgia now accounts for human actions that are difficult to quantify with data (e.g., wearing of face masks), in addition to human movement quantified through cell phone data and other sources. The new model fits reported cases, deaths, movement data, and a temporal trend in baseline transmission capturing other human behaviors. The model projects cases, hospitalizations and deaths six weeks out under three social distancing scenarios.

Nowcast of outbreak size

March 27, 2020
The Nowcast of the COVID‑19 outbreak size by US state has launched on the COVID‑19 Portal. The Nowcast is an estimate of the total number of unreported cases by state. Nowcasts are estimated for the 50 states and for the US as a whole, and are calculated from COVID‑19 case reports and fatalities.

Stochastic model for Georgia

March 15, 2020
The COVID‑19 Portal now includes a stochastic model for the COVID‑19 outbreak in the state of Georgia.

Effect of early intervention

March 15, 2020
CEID has released an anlysis of the effect of early intervention on its COVID‑19 Portal. The analysis of intervention timing and outbreak size by province in China clearly demonstrates the importance of early intervention.

Estimating final outbreak size

March 3, 2020
The CEID COVID‑19 Portal now includes a model that provides insight into the final size of the ongoing COVID‑19 outbreak. The model estimates global outbreak sizes by probabilistically incorporating the sparking of new local outbreaks across the globe. The model estimates outbreak sizes for best-case, worst-case and average-case scenarios under a range of assumptions, including how fast local containment efforts improve.

The Center for the Ecology of Infectious Diseases (CEID) is a research unit housed in the Odum School of Ecology at the University of Georgia. The mission of the CEID is to bring together social and natural scientists through data science, basic biology, and scientific synthesis.