These tables will stop being updated after June 1, 2023. COVID-19 vaccination reporting is expected to resume when a new COVID-19 vaccination formulation is authorized.

As 4/22/2023, CDC recommends bivalent vaccine for everyone regardless of age and whether or not the person has had prior monovalent vaccine.

This table shows the cumulative number and percentage of people who have received an updated (bivalent) COVID-19 vaccine by current town of residence and age group.

• Data are reported weekly on Thursday and include doses administered to Saturday of the previous week.

• All data in this report are preliminary. Data for previous weeks may be changed because of delays in reporting, deduplication, or correction of errors.

• The table groups people based on their current age and excludes people known to be deceased.

• The analyses here are based on data reported to CT WiZ which is the immunization information system for CT. Connecticut COVID-19 Vaccine Program providers are required to report to CT WiZ all COVID-19 doses administered in CT including to CT residents and to residents of other jurisdictions. CT Wiz also receives records on CT residents vaccinated in other jurisdictions and by federal entities which share data with CT WiZ electronically (currently: RI, NJ, New York City, DE, Philadelphia, NV, Indian Health Service, Department of Veterans Affairs (doses administered since 11/2022)). Electronic data exchange is being added jurisdiction-by-jurisdiction. Once a jurisdiction is added to CT WiZ, the records for residents of that jurisdiction vaccinated in CT are removed. For example, when CT residents vaccinated in NYC were added, NYC residents vaccinated in CT were removed.

• Town-level coverage estimates have been capped at 100%. Observed coverage may be greater than 100% for multiple reasons, including census denominator data not including all individuals that currently reside in the town (e.g., part time residents, change in population size since the census), errors in address data or other reporting errors.

• Town of residence is verified by geocoding the reported address and then mapping it a town using municipal boundaries. If an address cannot be geocoded, the reported town is used.

• Rows with less than 5 people are suppressed.

• CT DPH 2019 census data are used to create town-level cumulative percentage estimates. CT DPH 2014 census data are used to create cumulative percentage estimates for specific age groups. Both use the latest available data.

• Caution should be used when interpreting coverage estimates for towns with large college/university populations since coverage may be underestimated. In the census, college/university students who live on or just off campus would be counted in the college/university town. However, if a student was vaccinated in his/her hometown, the student may be counted as a vaccine recipient in that town.