Shorter Incubation Period among Unvaccinated Delta Variant Coronavirus Disease 2019 Patients in Japan.
COVID-19
Japan
SARS-CoV-2
delta variant
incubation period
serial interval
transmission time relative to symptom onset
unvaccinated
Journal
International journal of environmental research and public health
ISSN: 1660-4601
Titre abrégé: Int J Environ Res Public Health
Pays: Switzerland
ID NLM: 101238455
Informations de publication
Date de publication:
20 Jan 2022
20 Jan 2022
Historique:
received:
18
12
2021
revised:
16
01
2022
accepted:
18
01
2022
entrez:
15
2
2022
pubmed:
16
2
2022
medline:
19
2
2022
Statut:
epublish
Résumé
Few studies have assessed incubation periods of the severe acute respiratory syndrome coronavirus 2 Delta variant. This study aimed to elucidate the transmission dynamics, especially the incubation period, for the Delta variant compared with non-Delta strains. We studied unvaccinated coronavirus disease 2019 patients with definite single exposure date from August 2020 to September 2021 in Japan. The incubation periods were calculated and compared by Mann-Whitney U test for Delta (with L452R mutation) and non-Delta cases. We estimated mean and percentiles of incubation period by fitting parametric distribution to data in the Bayesian statistical framework. We enrolled 214 patients (121 Delta and 103 non-Delta cases) with one specific date of exposure to the virus. The mean incubation period was 3.7 days and 4.9 days for Delta and non-Delta cases, respectively (
Identifiants
pubmed: 35162151
pii: ijerph19031127
doi: 10.3390/ijerph19031127
pmc: PMC8834809
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
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