3. 3 June 2021 risk assessment for SARS-CoV-2 variant: Delta (VOC-21APR-02, B. 1.617.
2). London (UK): Public Health England; 2021. Available: https://www. gov. uk/gov …

Several lines of evidence now attest that a considerable number of severe acute respiratory
syndrome coronavirus 2 (SARS-CoV-2) variants are circulating in many countries around …

It is often messaged that herd immunity to Severe Acute Respiratory Syndrome Coronavirus
2 (SARS-CoV2 (CoV-2)), the causative agent of Coronavirus Disease 2019 (COVID-19), will …

Herd immunity, where a pathogen can no longer efficiently spread in a population, is
achieved when a large proportion of the population becomes immune, making the spread of …

After a year of living with the COVID-19 pandemic and its associated consequences, hope
looms on the horizon thanks to vaccines. The question is what percentage of the population …

Background. An immune correlate of protection from SARS-CoV-2 infection is urgently
needed. Methods. We used an ongoing household cohort with an embedded transmission …

Vaccination elicits immune responses capable of potently neutralizing SARS-CoV-2.
However, ongoing surveillance has revealed the emergence of variants harboring mutations …

As severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spreads, the susceptible
subpopulation declines causing the rate at which new infections occur to slow down …

4 Yang S, Yu Y, Jian F, et al. Antigenicity and infectivity characterisation of SARS-CoV-2 BA.
2.86. Lancet Infect Dis 2023; 23: e457–59. 5 Kosugi Y, Plianchaisuk A, Putri O, et al …

Background To allow a return to a pre-COVID-19 lifestyle, virtually every country has
initiated a vaccination program to mitigate severe disease burden and control transmission …