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Volume 28, Number 10—October 2022
Research Letter

Infection Rate of SARS-CoV-2 in Asymptomatic Healthcare Workers, Sweden, June 2022

Kim Blom, Sebastian Havervall, Ulrika Marking, Nina Greilert Norin, Philip Bacchus, Ramona Groenheit, Andreas Bråve, Charlotte Thålin, and Jonas KlingströmComments to Author 
Author affiliations: Karolinska Institutet, Stockholm, Sweden (K. Blom, S. Havervall, U. Marking, N. Greilert Norin, C. Thålin, J. Klingström); Public Health Agency of Sweden, Solna, Sweden (K. Blom, R. Groenheit, A. Bråve, J. Klingström); Karolinska Institutet Danderyd Hospital, Stockholm (S. Havervall, U. Marking, N. Greilert Norin, C. Thålin); Swedish Armed Forces, Umeå, Sweden (P. Bacchus)

Main Article


Characteristics of 259 asymptomatic HCWs who participated in a quantitative real-time PCR screening survey, Stockholm, Sweden, June 28–29, 2022*

Characteristic All HCWs
Infected HCWs
259 (100)
6 (2.3)
M 26 (60) 1 (17)
233 (40)
5 (83)
Median age, y
Vaccination status
No vaccination 5 (2) 1 (17)
1 vaccine dose 2 (1) 0
2 vaccine doses 24 (9) 0
3 vaccine doses
228 (88)
5 (83)
Previous Infections
1 infection 119 (46) 2 (33)
2 infections
11 (4) 0

*Values are no. (%) except as indicated. HCW, healthcare worker.

Main Article

Page created: August 12, 2022
Page updated: September 21, 2022
Page reviewed: September 21, 2022
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