Tag: <span>pre-symptomatic</span>

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COVID-19 asymptomatic infection estimation

Mounting evidence suggests that there is an undetected pool of COVID-19 asymptomatic but infectious cases. Estimating the number of asymptomatic infections has been crucial to understand the virus and contain its spread, which is, however, hard to be accurately counted. A new study proposes an approach of Machine Learning based fine-grained Simulator (MLSim), which integrates...

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Asymptomatic and pre-symptomatic patients infected with COVID-19

Asymptomatic but infectious people have been reported in many infectious diseases. Examples include herpes, cytomegalovirus and respiratory diseases caused by viruses such as H1N1 or H5N1 influenza, being asymptomatic and pre-symptomatic people a reservoir hidden for detection systems. The Chinese government first reported the infection as pneumonia of unknown origin in late December 2019; then...

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Impact of asymptomatic carriers on COVID-19 transmission

Asymptomatic carriers of the virus display no clinical symptoms but are known to be contagious. Recent evidence reveals that this sub-population, as well as persons with mild symptoms, represent a major contributor in the propagation of COVID-19. The asymptomatic sub-population frequently escapes detection by public health surveillance systems. Because of this, the currently accepted estimates...

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Transmission interval estimates suggest pre-symptomatic spread of COVID-19

A new study determines the incubation period and serial interval distribution for transmission clusters in Singapore and in Tianjin. Authors infer the basic reproduction number and identify the extent of pre-symptomatic transmission by collecting outbreak information from Singapore and Tianjin, China, reported from Jan 19 – Feb 26 and Jan 21 – Feb 27, respectively....