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Chickenpox incidence in Poland rose in 2023, exceeding 500 cases per 100,000 population. While the increase slowed, continued monitoring of this infectious disease is crucial.

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Area of Science:

  • Epidemiology
  • Public Health
  • Infectious Disease Surveillance

Background:

  • Chickenpox (varicella) incidence in Poland remained relatively stable between 2016-2023, with notable decreases in 2020-2021 due to the COVID-19 pandemic.
  • An increase in chickenpox cases was observed in 2022, reaching 453.9 per 100,000 population.

Purpose of the Study:

  • To evaluate the epidemiological status of chickenpox in Poland for the year 2023.
  • To compare the 2023 chickenpox data with incidence rates from preceding years.

Main Methods:

  • Utilized data from the National Institute of Public Health NIH - National Research Institute.
  • Analyzed annual bulletins on infectious diseases and vaccinations in Poland for 2023.

Main Results:

  • In 2023, 190,825 chickenpox cases were recorded, an 11.13% increase from 2022, with an overall incidence of 506.2/100,000 population.
  • The highest incidence rates were observed in children aged 0-4 (4,741.4/100,000) and 5-9 years (4,155.1/100,000).
  • 123,743 individuals were vaccinated against chickenpox in 2023, with 95.49% being children under 11.

Conclusions:

  • The reduced rate of increase in 2023 suggests potential stabilization of chickenpox epidemiology.
  • However, the incidence rate exceeding 500 per 100,000 warrants ongoing surveillance in subsequent years.