SC Testing Data & Projections (COVID-19)

Wednesday, August 5, 2020, 2:02 pm 
This page will be updated regularly as information becomes available. 


DHEC's Public Health Laboratory receives samples from healthcare providers to be tested for COVID-19. The U.S. Food and Drug Administration (FDA) has approved some private labs to also conduct testing for COVID-19. These labs are required to report positive tests for the virus in South Carolina residents to DHEC. Numerical, graphic and mapping summaries regarding testing and the number of observed and projected cases in South Carolina are shown below. Additional details concerning the distribution of cases can be found on the pages showing cases by county & ZIP code and demographic data.



COVID-19 Testing Table 08.05.2020



New COVID-19 Cases Per Day (Epi Curve)

The new COVID-19 cases per day (Epi curve) is located at the bottom of the Coronavirus COVID-19 Cases in South Carolina map at the top of this page.


COVID-19 Deaths in South Carolina by Date

To clearly provide the actual dates of COVID-19-related deaths, DHEC updates daily this graph representing COVID-19 Deaths in South Carolina by Date of Death. This data visualization provides the date that COVID-19 deaths occurred, not the day they were announced, as there can sometimes be a delay in when a death occurred to when it is confirmed and reported publicly.

Last updated August 5, 2020.

COVID-19 Deaths by Date and Event 08.05.2020




Positive Cases Indicated by Heat Map

The 14-day Heat Map displays the most recent reported cases during the past 14-day period and estimates where the current burden is due to recently reported cases.

COVID-19 14-Day Rolling Heat Map July 22 - August 5, 2020

The heat map indicates reported cases of COVID-19 in the state. Regardless of the number of reported cases within an area, all South Carolinians should take seriously the recommended precautions for protecting against this disease. The cumulative Heat Map shows all historic reported cases of COVID-19.

COVID-19 Rolling Heat Map - March 4 - August 5, 2020


Percent Positive Trends Among Reported COVID-19 Cases

Last updated August 5, 2020

The percent positive graphs show trends in the percent of cases of COVID-19 relative to the number of tests performed during the last 28 and 14 days, respectively. The percent positive is the number of individual people that tested positive (1,175 as of August 4) divided by the number of individuals tested (5,679 as of August 4) by both DHEC’s laboratory and private laboratories, then multiplied by 100 (20.7% for August 4).

When the percent positive is high, it may indicate that there isn't enough testing being performed to capture how much disease is in the community and testing may be focused on people who are more severely ill.

When the percent positive is low, it may indicate that more widespread testing is being performed and the percent positive may more accurately reflect how much disease is present in the community.



COVID-19 Percent Positive 14-Day Molecular 08.05.2020


COVID-19 Percent Positive 28-Day Molecular 08.05.2020


Summary of COVID-19 Case Reports through August 1 and Projections through August 22

Last updated August 3, 2020

Table 1 presents numbers of COVID-19 cases observed in the ‘Sunday through Saturday’ weeks since March 1 as well as projections of COVID-19 cases through to the week of August 16 – August 22.

For each week, data are presented regarding the number of new cases, the overall number of cases up to that time, the case rate per 100,000 persons up to that point, and an indication regarding whether the numbers were observed (i.e. confirmed cases reported to DHEC) or have been projected.

Table 1 Observed and Projected SC COVID-19 Cases by Week: March 1 to August 22

COVID19 - Projections Table 1 - 08.03.2020


Table 2 below provides additional perspectives regarding the projected case rate of 2,295 per 100,000 in SC on August 22, by comparing it to case rates already observed as of August 1 in those states that have suffered the greatest burden of COVID-19.

Table 2 Comparing South Carolina’s Projected August 22 COVID-19 Case Rate per 100,000 to Rates Already Observed as of August 1 by Selected Severely Impacted States

COVID19 - Projections Table 2 - 08.03.2020

Additional Notes and Explanations

  1. DHEC reports laboratory-confirmed cases so that the number of positive tests reported for a particular day is considered to be the number of new cases for that day. However, laboratories are not always able to process and test the samples they receive on the same day they get them. This can relate to the time of day when some samples reach them, and occasionally also to temporary shortages of chemicals needed to perform the tests.
  2. Regarding table 2 it is also important to note that uncertainties exist regarding projections made for the coming weeks. For example, since not all persons who are infected are tested, the number of officially reported cases is not identical to the actual number of cases in the population.
  3. The modeling and projections shown below come from the Institute for Health Metrics and Evaluation (IHME), which offers one of the most commonly used models. Predictions made by different models may typically differ as each may depend on slightly different assumptions and use of data. Though the predictions regarding future weeks and months do not match perfectly, they generally provide helpful perspectives regarding the future course of the pandemic.

COVID-19 projections assuming full social distancing through October 2020





Career of Service Community Survey COVID-19