SARS-CoV-2 Delta AY.1 Variant Cluster in an Accommodation Facility for COVID-19: Cluster Report

Takayuki Ohishi, Takuya Yamagishi, Hitomi Kurosu, Hideaki Kato, Yoko Takayama, Hideaki Anan and Hiroyuki Kunishima
Additional contact information
Takayuki Ohishi: Department of Infection Control and Prevention, Saiseikai Yokohama Eastern Tobu Hospital, 3-6-1 Shimosueyoshi, Tsurumi-ku, Yokohama 230-8765, Japan
Takuya Yamagishi: Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku Ward, Tokyo 162-8640, Japan
Hitomi Kurosu: Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku Ward, Tokyo 162-8640, Japan
Hideaki Kato: Kanagawa Prefectural Government, 1, Nihonodori, Naka-ku, Yokohama 231-0021, Japan
Yoko Takayama: Kanagawa Prefectural Government, 1, Nihonodori, Naka-ku, Yokohama 231-0021, Japan
Hideaki Anan: Kanagawa Prefectural Government, 1, Nihonodori, Naka-ku, Yokohama 231-0021, Japan
Hiroyuki Kunishima: Kanagawa Prefectural Government, 1, Nihonodori, Naka-ku, Yokohama 231-0021, Japan

IJERPH, 2022, vol. 19, issue 15, 1-12

Abstract: Background: This study aimed to examine the cause of and effective measures against cluster infections, including the delta AY.1 variant of novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that occurred in an accommodation facility. Methods: We surveyed the zoning and ventilation systems of the cluster accommodation, examined the staff’s working conditions, conducted an interview, and administered a SARS-CoV-2 test (positive samples were further tested with molecular biological test). Results: Among the 99 employees working at the accommodation, 10 were infected with the delta AY.1 variant. The causes of the cluster infections were close-distance conversations without an unwoven-three-layer mask and contact for approximately five minutes with an unwoven mask under hypoventilated conditions. Conclusions: The Delta AY.1 infection may occur via aerosols and an unwoven mask might not prevent infection in poorly ventilated small spaces. Routine infection detection and responding quickly and appropriately to positive results helps to prevent clusters from spreading.

Keywords: SARS-CoV-2; Delta AY.1; variant cluster (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1660-4601/19/15/9270/pdf (application/pdf)
https://www.mdpi.com/1660-4601/19/15/9270/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jijerp:v:19:y:2022:i:15:p:9270-:d:874766

Access Statistics for this article

IJERPH is currently edited by Ms. Jenna Liu

More articles in IJERPH from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().