2020
DOI: 10.1101/2020.02.03.20020248
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Estimation of the asymptomatic ratio of novel coronavirus infections (COVID-19)

Hiroshi Nishiura
1
,
T. Kobayashi
2
,
Takeshi Miyama
3
et al.

Abstract: A total of 565 Japanese citizens were evacuated from Wuhan, China to Japan. All passengers were screened for symptoms and also undertook reverse transcription polymerase chain reaction testing, identifying 5 asymptomatic and 7 symptomatic passengers testing positive for 2019-nCoV. We show that the screening result is suggestive of the asymptomatic ratio at 41.6%.

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Cited by 673 publications

(785 citation statements)
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“…This value is consistent with the large range of figures suggested in the literature (e.g. from 18% to 75% [34–36]). Asymptomatic branching probabilities are highest for younger age groups, which has important implications, e.g.…”
Section: Resultssupporting
confidence: 92%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
show abstract
“…This value is consistent with the large range of figures suggested in the literature (e.g. from 18% to 75% [34–36]). Asymptomatic branching probabilities are highest for younger age groups, which has important implications, e.g.…”
Section: Resultssupporting
confidence: 92%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
show abstract
“…Our asymptomatic proportion is much higher than modeling estimates based on European data (17.9%; 95% CI: 15.5-20.2%). However, our findings are in line with a recent review that found that approximately 40%-50% of those infected with SARS-CoV-2 will remain asymptomatic, and that they can transmit the virus for perhaps longer than 14 days [3,4].…”
Section: Discussionsupporting
confidence: 92%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
show abstract
“…All patients are in mild condition and none of the patients admitted to intensive care. This is consistent with studies that estimate the number of asymptomatic patients for COVID-19 around less than half (30). As of May 24, 2020, only 3 fatal cases of laboratory-confirmed COVID-19 were reported in East Kalimantan (13).…”
Section: Discussionsupporting
confidence: 92%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
show abstract
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