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Coronavirus (COVID-19) Collection
Monitoring the COVID-19 immune landscape in Japan
Since the COVID-19 epidemic spread on a global scale in 2020, it considerably altered daily life. With the hope of mitigating the COVID-19 risk, vaccination campaigns began in December 2020 in many countries, often using a prioritization vaccination strategy (Haas et al., 2021; Hall et al., 2021; Jentsch et al., 2021; Mathieu et al., 2021; Sasanami et al., 2022; Thompson et al., 2021). Mass vaccination campaigns occurred primarily when the original (wild-type) strain, the Alpha variant (B.1.1.7), the Beta variant (B.1.351), or other variants were dominant in circulation and against which the available vaccines provided substantial protection (Chemaitelly et al., 2021; Chung et al., 2021; Dagan et al., 2021; Haas et al., 2021; Hall et al., 2021; Pritchard et al., 2021).An automated chemiluminescent immunoassay (CLIA) detects SARS-CoV-2 neutralizing antibody levels in COVID-19 patients and vaccinees
Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), the causative agent for coronavirus disease 2019 (COVID-19), has resulted in a devastating global pandemic. Nucleic acid tests of SARS-CoV-2 represent the gold standard of clinical diagnostic methods for COVID-19 detection (World Health Organization, 2021). Serological assays can play a supplementary but indispensable role in: (1) diagnosis of suspected cases with negative viral RNA tests or previous COVID-19 infection; (2) monitoring immune responses to assess the course, degree and durability of immunity; (3) identifying potential convalescent plasma donors; (4) therapeutic antibody development and evaluation; and (5) vaccine development and evaluation (Liu and Rusling, 2021).Evaluating the impact of the travel ban within mainland China on the epidemic of the COVID-19
The global outbreak caused by the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) has been declared a pandemic by the World Health Organization (WHO). The number of imported SARS-CoV-2 cases in many countries has been rising due to large-scale geographic spread (Candido et al., 2020; Li et al., 2020). The ongoing epidemic of COVID-19 presents significant challenges to the development of the economy. As of November 15, 2020, the COVID-19 epidemic has caused 53.7 million confirmed cases and 1.3 million deaths worldwide (2020f).Transmissibility of asymptomatic COVID-19: Data from Japanese clusters
The early estimate of asymptomatic ratio has been reported as ranging from 8 to 54% (Nishiura et al., 2020). Besides, more than half of secondary transmissions with coronavirus disease 2019 (COVID-19) are considered to occur from asymptomatically infected people (Johansson et al., 2021). The estimate reflects the substantial number of secondary transmissions from pre-symptomatic individuals who eventually develop illness.Estimation of the probable outbreak size of novel coronavirus (COVID-19) in social gathering events and industrial activities
The outbreak of COVID-19 has currently spread to more than 217 territories (Hui et al., 2020) since December 2019 (Chang et al., 2020; Li et al., 2020; Roda et al., 2020; Wu et al., 2020). According to the latest statistics, up to May 1, 2020, there have been more than 3,389,933 confirmed cases found in more than 187 countries covering six continents (Johns Hopkins Coronavirus Resource Center, 2020). COVID-19 was officially declared by the World Health Organization (WHO) a pandemic on March 29, 2020 (WHO, 2020).The effectiveness of quarantine and isolation determine the trend of the COVID-19 epidemics in the final phase of the current outbreak in China
Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 8Estimation of the reproductive number of novel coronavirus (COVID-19) and the probable outbreak size on the Diamond Princess cruise ship: A data-driven analysis
A novel coronavirus (COVID-19), which originated from Wuhan, China, has spread to 25 countries worldwide. Up to February 16, 2020, the cumulative number of confirmed cases were 70548 in China (National Health Commission of the People’s Republic of China, 2020) and 683 in other countries (World Health Organization, 2020). The whole world, especially China, has taken extraordinary measures to contain the outbreak of COVID-19, and the effects were already present.
