J Korean Med Sci.  2022 Jan;37(2):e14. 10.3346/jkms.2022.37.e14.

Risk of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Transmission Among Healthcare Workers Dining in Hospital Staff Cafeterias

• Jung J
• Lim YJ
• Kim EO
• Kim SH

• KMID: 2524285
• DOI: http://doi.org/10.3346/jkms.2022.37.e14

Abstract

Background
Preventive measures are needed to reduce the risk of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection among healthcare workers (HCWs). Notably, hospital staff are usually exposed when they are unmasked. There are limited data on the risk of transmission during mealtimes at hospital staff cafeterias. We aimed to evaluate the risk of transmission in cafeterias.
Methods
From January 2020 through September 2021, we analyzed the risk of SARS-CoV-2 transmission through closed-circuit television and radio-frequency identification tracking and follow-up testing when 33 HCWs, who were eventually diagnosed as coronavirus disease 2019 (COVID-19), ate in staff cafeterias during the infectious period. The seats were arranged so the HCWs would sit on either side without facing each other. There were no plastic barriers installed, and HCWs were encouraged not to talk during meals.
Results
Three of the 119 individuals who ate at seats next (about 30 cm) to index during the period of transmission and underwent follow-up SARS-CoV-2 polymerase chain reaction tests were diagnosed with COVID-19 (2.5%; 95% confidence interval, 0.5–7.4%). Among the 98 HCWs who were investigated about talking during meals, there was a higher attack rate among those who spoke with each other than among those who did not (12.5% [3/24] vs. 0% [0/74], P = 0.013).
Conclusion
The risk of transmission in a hospital’s employee cafeterias is not high with sideby-side seating, especially in the absence of conversation.

Keyword

SARS-CoV-2; COVID-19; Transmission; Meal; Healthcare Workers

Reference

1. Lee U, Kim SE, Lee SY, Wi HN, Choi O, Park JW, et al. Source analysis and effective control of a COVID-19 Outbreak in a university teaching hospital during a period of increasing community prevalence of COVID-19. J Korean Med Sci. 2021; 36(24):e179. PMID: 34155840.

2. Jo HJ, Kim JS, Choe PG, Lee HY, Chang E, Jung H, et al. Work restrictions for healthcare personnel with potential in-hospital exposure to SARS-CoV-2: experience at a tertiary hospital. J Korean Med Sci. 2021; 36(38):e274. PMID: 34609094.

3. Richterman A, Meyerowitz EA, Cevik M. Hospital-acquired SARS-CoV-2 infection: lessons for public health. JAMA. 2020; 324(21):2155–2156. PMID: 33185657.

4. Ochoa-Leite C, Bento J, Rocha DR, Vasques I, Cunha R, Oliveira Á, et al. Occupational management of healthcare workers exposed to COVID-19. Occup Med (Lond). 2021; 71(8):359–365. PMID: 34415346.

5. Jung J, Lim SY, Lee J, Bae S, Lim YJ, Hong MJ, et al. Clustering and multiple-spreading events of nosocomial severe acute respiratory syndrome coronavirus 2 infection. J Hosp Infect. 2021; 117:28–36. PMID: 34453983.

6. Jung J, Lee J, Kim E, Namgung S, Kim Y, Yun M, et al. Frequent occurrence of SARS-CoV-2 transmission among non-close contacts exposed to COVID-19 patients. J Korean Med Sci. 2021; 36(33):e233. PMID: 34427062.

7. Guy GP Jr, Lee FC, Sunshine G, McCord R, Howard-Williams M, Kompaniyets L, et al. Association of state-issued mask mandates and allowing on-premises restaurant dining with county-level COVID-19 case and death growth rates—United States, March 1–December 31, 2020. MMWR Morb Mortal Wkly Rep. 2021; 70(10):350–354. PMID: 33705364.

8. Asadi S, Wexler AS, Cappa CD, Barreda S, Bouvier NM, Ristenpart WD. Aerosol emission and superemission during human speech increase with voice loudness. Sci Rep. 2019; 9(1):2348. PMID: 30787335.

9. Centers for Disease Control and Prevention. COVID-19: Community, Work, & School. Workplaces & Businesses – considerations for restaurant and bar operators. Updated June 14, 2021. Accessed October 19, 2021. https://www.cdc.gov/coronavirus/2019-ncov/community/organizations/business-employers/bars-restaurants.html .

10. The New York Times. Those anti-Covid plastic barriers probably don’t help and may make things worse. Updated 2021. Accessed October 20, 2021. https://www.nytimes.com/2021/08/19/well/live/coronavirus-restaurants-classrooms-salons.html .