Tag: <span>asymptomatic</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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Surgical and N95 masks

The rapid global spread of SARS-CoV-2 and the resulting coronavirus disease (COVID-19) pandemic has led to urgent efforts to contain and mitigate transmission, leading to significant and widespread socioeconomic disruption. As of April 3rd 2020, over one million cases have been reported worldwide, as well as over 60,000 deaths, with ongoing spread in most parts...

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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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Imperial College predicts that we will be able to go outside one in three months due to the coronavirus

There are two main challenges in assessing the severity of clinical outcomes during an epidemic of a newly emerging infection such as COVID-19. The first one ―surveillance―, is typically biased towards detecting clinically severe cases, particularly at the start of an epidemic when diagnostic capacity is limited (estimates of the proportion of fatal cases), the...

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Symptom progression of COVID-19

A new study have examined symptom frequency and clinical progression for a selection of cases from clinical studies in mainland China and individual case reports in Hong Kong, Japan, Singapore and South Korea. Authors noted that the number of cases presenting with pneumoniais different in mainland China compared to the case studies from Hong Kong,...

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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....