NOTE: This dataset has been retired and marked as historical-only.

Weekly rates of COVID-19 cases, hospitalizations, and deaths among people living in Chicago by vaccination status and age.

Rates for fully vaccinated and unvaccinated begin the week ending April 3, 2021 when COVID-19 vaccines became widely available in Chicago. Rates for boosted begin the week ending October 23, 2021 after booster shots were recommended by the Centers for Disease Control and Prevention (CDC) for adults 65+ years old and adults in certain populations and high risk occupational and institutional settings who received Pfizer or Moderna for their primary series or anyone who received the Johnson & Johnson vaccine.

Chicago residency is based on home address, as reported in the Illinois Comprehensive Automated Immunization Registry Exchange (I-CARE) and Illinois National Electronic Disease Surveillance System (I-NEDSS).

Outcomes: • Cases: People with a positive molecular (PCR) or antigen COVID-19 test result from an FDA-authorized COVID-19 test that was reported into I-NEDSS. A person can become re-infected with SARS-CoV-2 over time and so may be counted more than once in this dataset. Cases are counted by week the test specimen was collected. • Hospitalizations: COVID-19 cases who are hospitalized due to a documented COVID-19 related illness or who are admitted for any reason within 14 days of a positive SARS-CoV-2 test. Hospitalizations are counted by week of hospital admission. • Deaths: COVID-19 cases who died from COVID-19-related health complications as determined by vital records or a public health investigation. Deaths are counted by week of death.

Vaccination status: • Fully vaccinated: Completion of primary series of a U.S. Food and Drug Administration (FDA)-authorized or approved COVID-19 vaccine at least 14 days prior to a positive test (with no other positive tests in the previous 45 days). • Boosted: Fully vaccinated with an additional or booster dose of any FDA-authorized or approved COVID-19 vaccine received at least 14 days prior to a positive test (with no other positive tests in the previous 45 days). • Unvaccinated: No evidence of having received a dose of an FDA-authorized or approved vaccine prior to a positive test.

CLARIFYING NOTE: Those who started but did not complete all recommended doses of an FDA-authorized or approved vaccine prior to a positive test (i.e., partially vaccinated) are excluded from this dataset.

Incidence rates for fully vaccinated but not boosted people (Vaccinated columns) are calculated as total fully vaccinated but not boosted with outcome divided by cumulative fully vaccinated but not boosted at the end of each week. Incidence rates for boosted (Boosted columns) are calculated as total boosted with outcome divided by cumulative boosted at the end of each week. Incidence rates for unvaccinated (Unvaccinated columns) are calculated as total unvaccinated with outcome divided by total population minus cumulative boosted, fully, and partially vaccinated at the end of each week. All rates are multiplied by 100,000.

Incidence rate ratios (IRRs) are calculated by dividing the weekly incidence rates among unvaccinated people by those among fully vaccinated but not boosted and boosted people.

Overall age-adjusted incidence rates and IRRs are standardized using the 2000 U.S. Census standard population.

Population totals are from U.S. Census Bureau American Community Survey 1-year estimates for 2019.

All data are provisional and subject to change. Information is updated as additional details are received and it is, in fact, very common for recent dates to be incomplete and to be updated as time goes on. This dataset reflects data known to CDPH at the time when the dataset is updated each week.

Numbers in this dataset may differ from other public sources due to when data are reported and how City of Chicago boundaries are defined.

For all datasets related to COVID-19, see https://data.cityofchicago.org/browse?limitTo=datasets&sortBy=alpha&tags=covid-19.

Data Source: Illinois' National Electronic Disease Surveillance System (I-NEDSS), Illinois Comprehensive Automated Immunization Registry Exchange (I-CARE), U.S. Census Bureau American Community Survey

While mass vaccination campaigns against COVID-19 have inoculated almost 200 million Americans and billions more worldwide, significant pockets of vaccine hesitancy remain. Research has firmly established that vaccine efficacy is an important driver of public vaccine acceptance and choice. However, current vaccines offer widely varying levels of protection against different adverse health outcomes of COVID-19. This study employs an experiment embedded on a survey of 1,194 US adults in June 2021 to examine how communications about vaccine efficacy affect vaccine choice. The experiment manipulated how vaccine efficacy was defined across four treatments: (1) protection against symptomatic infection; (2) protection against severe illness; (3) protection against hospitalization/death; (4) efficacy data on all three metrics. The control group received no efficacy information. Subjects were asked to choose between a pair of vaccines—a one-dose viral vector vaccine or two-dose mRNA vaccine—whose efficacy data varied across the four experimental treatment groups. Efficacy data for each vaccine on each dimension were adapted from clinical trial data on the Johnson & Johnson/Janssen and Pfizer/BioNTech vaccines. Among all respondents, only modest preference gaps between the two vaccines emerged in the control group and when the two vaccines’ roughly equivalent efficacy data against hospitalization and death were reported. Strong preferences for a two-dose mRNA vaccine emerged in treatments where its higher efficacy against symptomatic or severe illness was reported, as well as in the treatment where data on all three efficacy criteria were reported. Unvaccinated respondents preferred a one-dose viral vector vaccine when only efficacy data against hospitalization or death was presented. Black and Latino respondents were significantly more likely to choose the one-shot viral vector vaccine in the combined efficacy treatment than were whites. Results speak to the importance of understanding how communications about vaccine efficacy affect public preferences in an era of increasing uncertainty about efficacy against variants.

This dataset is no longer updated, find vaccination data here From 24 March 2022, Public Health Scotland (PHS) began reporting the number of people who have received a fourth dose of Covid-19 vaccination. Vaccine uptake statistics among care home residents and those who are severely immunosuppressed will be reported initially. PHS will include further updates as the Spring/Summer vaccination programme rolls out. In addition, as part of our continuous review of reporting, PHS made some changes to vaccine uptake statistics. From 24 March 2022, the deceased and those who no longer live in Scotland are no longer be included in vaccine uptake statistics. Historic trend data have been updated to take into account this new methodology for all apart from the Daily Trends by JCVI Priority Group table (more details about the data in this table are below). Scotland level data for all vaccinations administered (i.e. including those who have since died or moved from Scotland) are still available in the Daily Trend of All Vaccinations Delivered in Scotland table. Also from 24 March 2022, Dose 3/Booster doses are termed "Dose 3". To allow new data to be fully processed and available at 14:00, the Daily COVID-19 in Scotland and COVID-19 Vaccination in Scotland datasets will be temporarily unavailable from 12:45 to 14:00. During this window, the datasets will not be visible and any queries made to these datasets will return a 404 - Not found error. At all other times the datasets will be available in full as usual. PHS reviewed the JCVI priority group uptake figures from 18 November 2021, specifically how we derive the numerator and the denominator. The rational for the change is to ensure we report on most up to date living population for each group. For this, the list of individuals in each cohort has been refreshed to be more current. We have also removed individuals who have since died to reflect the current living population. From the 24 March 2022 those who are no longer living in Scotland have also been removed from the numerator and denominator for JCVI priority group uptake figures. This means all the JCVI cohorts and populations have changed for both numerator and denominators on these two dates and care should be taken when interpreting trends. On 08 December 2020, a Coronavirus (COVID-19) vaccine developed by Pfizer BioNTech (Comirnaty) was first used in the UK as part of national immunisation programmes. The AstraZeneca (Spikevax) vaccine was also approved for use in the national programme, and rollout of this vaccine began on 04 January 2021. Moderna (Vaxzevria) vaccine was approved for use on 8 January 2021 and rollout of this vaccine began on 07 April 2021. These vaccines have met strict standards of safety, quality and effectiveness set out by the independent Medicines and Healthcare Products Regulatory Agency (MHRA). Those giving the vaccine to others were the first to receive the vaccination. In the first phase of the programme, NHS Scotland followed the independent advice received from the Joint Committee on Vaccination and Immunisation (JCVI) and prioritised delivery of the vaccine to those with the greatest clinical need, in line with the recommended order of prioritisation. For booster vaccinations a similar approach has been adopted. Definitions used in the vaccine uptake by JCVI priority group resource can be found in the JCVI Priority Group Definitions table. Individuals can appear in more than one JCVI priority group. This dataset provides information on daily number of COVID vaccinations in Scotland. Data on the total number of vaccinations in Scotland is presented by day administered and vaccine type, by age group, by sex, by non-age cohorts and by geographies (NHS Board and Local Authority). As the population in the cohorts can change with time, these will be refined when updated data are available. Additional data sources relating to this topic area are provided in the Links section of the Metadata below. Data visualisation and additional notes are available on the Public Health Scotland - Covid 19 Scotland dashboard.