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Comparative analysis of the risks of hospitalisation and death associated with SARS-CoV-2 omicron (B.1.1.529) and delta (B.1.617.2) variants in England: a cohort study

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Estimating excess mortality due to the COVID-19 pandemic: a systematic analysis of COVID-19-related mortality, 2020–21

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Estimating global, regional, and national daily and cumulative infections with SARS-CoV-2 through Nov 14, 2021: a statistical analysis

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Risk of SARS-CoV-2 reinfection and COVID-19 hospitalisation in individuals with natural and hybrid immunity: a retrospective, total population cohort study in Sweden

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Untangling the changing impact of non-pharmaceutical interventions and vaccination on European COVID-19 trajectories

(2022) Yong Ge et al.   Nature Communications

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Protective Effect of Previous SARS-CoV-2 Infection against Omicron BA.4 and BA.5 Subvariants

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A global panel database of pandemic policies (Oxford COVID-19 Government Response Tracker)

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Assessment of protection against reinfection with SARS-CoV-2 among 4 million PCR-tested individuals in Denmark in 2020: a population-level observational study

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SARS-CoV-2 infection rates of antibody-positive compared with antibody-negative health-care workers in England: a large, multicentre, prospective cohort study (SIREN)

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Quantifying the risk of SARS‐CoV‐2 reinfection over time

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A Systematic Review of the Protective Effect of Prior SARS-CoV-2 Infection on Repeat Infection

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Omicron and Delta variant of SARS‐CoV‐2: A comparative computational study of spike protein

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Pandemic Politics: Timing State-Level Social Distancing Responses to COVID-19

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A systematic review of antibody mediated immunity to coronaviruses: kinetics, correlates of protection, and association with severity

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