Estimation of the asymptomatic ratio of novel coronavirus infections (COVID 19)
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%
medRxiv