Hong Kong experienced a surge of Omicron BA.2 infections in early 2022, resulting in one of the highest per-capita death rates of COVID-19. The outbre...Read more

A fast-spreading SARS-CoV-2 variant identified in the United Kingdom in December 2020 has raised international alarm. We estimate that, in 16 out of 1...Read more

Estimating the time-varying reproductive number, Rt, is critical for monitoring transmissibility of an infectious disease. The impact of imported case...Read more

Background: Understanding the relative transmissibility of SARS-CoV-2 virus across different contact settings and the possibility of superspreading ev...Read more

Background The generation time distribution, reflecting the time between successive infections in transmission chains, is one of the fundamental epide...Read more

Transmission heterogeneity is a notable feature of the severe acute respiratory syndrome (SARS) and coronavirus disease 2019 (COVID-19) epidemics, tho...Read more

The generation time distribution, reflecting the time between successive infections in transmission chains, is a key epidemiological parameter for des...Read more

Controlling transmission in restaurants is an important component of public health and social measures for coronavirus disease. We examined the effect...Read more

During the coronavirus disease pandemic, international travel controls have been widely adopted. To determine the effectiveness of these measures, we ...Read more

The existing surveillance approaches and contact tracing identified around three quarters of coronavirus disease 2019 (COVID-19) cases during the thir...Read more

A fast-spreading severe acute respiratory syndrome coronavirus 2 variant identified in the United Kingdom in December 2020 has raised international al...Read more

Background: The relative contributions of asymptomatic, pre-symptomatic and symptomatic transmission of SARS-CoV-2 have not been clearly measured alth...Read more

Background: The time-varying reproduction number, Rt, is commonly used to monitor the transmissibility of an infectious disease during an epidemic, bu...Read more

Superspreading events (SSEs) have characterised previous epidemics of severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respira...Read more

The methods to ascertain cases of an emerging infectious disease are typically biased toward cases with more severe disease, which can bias the averag...Read more

Using detailed exposure information on COVID-19 cases, we estimated the mean latent period to be 5.5 (95% CI: 5.1-5.9) days, shorter than the mean inc...Read more

Background: Coronavirus disease 2019 (COVID-19) has caused a heavy disease burden globally. The impact of process and timing of data collection on the...Read more