State reports COVID cases among fully vaccinated people is less than 0.06%

Data updates on breakthrough cases in Connecticut

The Connecticut Department of Public Health is reporting that as of July 28, 2021, a total of 1,133 cases of COVID-19 among fully vaccinated persons in Connecticut have been confirmed. Cases of COVID-19 in fully vaccinated individuals are rare. Of the more than two million people in Connecticut who have completed their vaccine series, less than 0.06% of them have contracted the virus.

For more data on breakthrough cases in Connecticut, click here.


Data updates on variants in Connecticut


The following data contains the cumulative number of SARS-CoV-2 variants that have been identified among Connecticut residents as of today:


Variants of concern


  • B.1.1.7 (Alpha): 3,392 cases
  • B.1.351 (Beta): 36 cases
  • P.1 (Gamma): 189 cases
  • B.1.617.2/AY.1/AY.2/AY.3 (Delta): 195 cases


Variants of interest


  • B.1.427/B.1.429 (Epsilon): 211 cases
  • B.1.525 (Eta): 21 cases
  • B.1.526 (Iota): 1,804 cases
  • B.1.617.1 (Kappa): 2 cases
  • B.1.617.3: 0 cases


For more information on variants, see page 9 of this week’s extended COVID-19 data report.



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