(1) Background: The coronavirus 2019 (COVID-19) pandemic has caused multiple waves of cases and deaths in the United States (US). wild strain, Alpha variant (B.1.1.7) Delta (B.1.617.2) severe acute respiratory syndrome 2 (SARS-CoV-2) were principal culprits behind these waves. To mitigate pandemic, vaccination campaign was started January 2021. While vaccine efficacy is less than 1, breakthrough infections reported. This work aims to examine effects across 50 US states District Columbia. (2)...

The two nearby Amazonian cities of Iquitos and Manaus endured explosive COVID-19 epidemics may well have suffered the world's highest infection death rates over 2020, first year pandemic. State-of-the-art epidemiological modeling studies estimated that populations both came close to attaining herd immunity (>70% infected) at termination wave were thus protected. This makes it difficult explain more deadly second struck again in just months later, simultaneous with appearance a new P.1...

Background The Australian Government implemented a national vaccination campaign against COVID-19 beginning February 22, 2021. roll-out was criticised for being delayed relative to many high-income countries, but high levels of coverage were belatedly achieved. large-scale Omicron outbreak in January 2022 resulted massive number cases and deaths, although mortality would have been far higher if not vigorous efforts rapidly vaccinate the entire population. impact assessed over this extended...

Vaccination campaigns have both direct and indirect effects that act to control an infectious disease as it spreads through a population. Indirect arise when vaccinated individuals block transmission in any infection chain they are part of, this turn can benefit unvaccinated individuals. difficult quantify practice but, article, working with the susceptible–infected–recovered (SIR) model, analytically calculated important cases, pivoting on final size formula for epidemics. Their...

<abstract> <sec><title>Backgrounds</title><p>Brazil has suffered two waves of Coronavirus Disease 2019 (COVID-19). The second wave, coinciding with the spread Gamma variant, was more severe than first wave. Studies have not yet reached a conclusion on some issues including extent reinfection, infection fatality rate (IFR), attack (IAR) and effects vaccination campaign in Brazil, though it reported that confirmed reinfection at low level.</p> </sec>...

Vaccination campaigns have both direct and indirect effects that act to control an infectious disease as it spreads through a population. Indirect arise when vaccinated individuals block transmission in any infection chains they are part of, this turn can benefit unvaccinated individuals. difficult quantify practice, but here, working with the Susceptible-Infected-Recovered (SIR) model, analytically calculated important cases, pivoting on Final Size formula for epidemics. Their relationship...

Previous work has failed to fit classic SEIR epidemic models satisfactorily the prevalence data of famous English boarding school 1978 influenza A/H1N1 outbreak during children’s pandemic. It is still an open question whether a biologically plausible model can time series and attack rate correctly. To construct final model, we first used intentionally very flexible overfitted discrete-time epidemiologic learn epidemiological features from data. The was susceptible ( S ) – exposed E...

This paper examines a recently developed statistical approach for evaluating the effectiveness of vaccination campaigns in terms deaths averted. The makes predictions by comparing death rates vaccinated and unvaccinated populations. is preferred its simplicity straightforwardness, especially when compared to difficulties involved fitting many parameters dynamic SIRD-type model, which may even be an impossible task. We estimated number averted "ground truth" relatively simple scheme (e.g.,...

BackgroundsBrazil has suffered two waves of Coronavirus Disease 2019 (COVID-19). The second wave, coinciding with the spread Gamma variant, was more severe than first wave. Studies have not yet reached a conclusion on some issues including extent reinfection, infection fatality rate (IFR), attack (IAR) and effects vaccination campaign in Brazil, though it reported that confirmed reinfection at low level.MethodsWe modify classical Susceptible-Exposed-Infectious-Recovered (SEIR) model...

Backgrounds: Coronavirus 2019 (COVID-19) pandemic caused multiple waves of cases and deaths in the United States (US). The wild strain, Alpha variant (B.1.1.7) Delta (B.1.617.2) severe acute respiratory syndrome coronavirus 2 (SARS-COV-2) were principle culprits behind these waves. To mitigate pandemic, vaccination campaign was started January 2021. While vaccine efficacy is less than 1, breakthrough infections reported. This work aims to examine effects across 51 US states. Methods: Based...

Background: The Australian Government implemented a national vaccination campaign against SARS-CoV-2 on February 22, 2021, but the roll out was initially slow and widely criticised. After January 2022, large-scale Omicron outbreak resulted in massive number of cases deaths, although mortality rates would have been far higher if not for invigorated efforts to rapidly mass vaccinate entire population. This is first assessment population impact campaign.Methods: Limited publicly accessible data...