Background The global surge in the omicron (B. 1.1. 529) variant has resulted in many
individuals with hybrid immunity (immunity developed through a combination of SARS-CoV …

We are reviewing the current state of knowledge on the virological and immunological
correlates of long COVID, focusing on recent evidence for the possible association between …

Background Immunocompromised individuals are not optimally protected by COVID-19
vaccines and potentially require additional preventive interventions to mitigate the risk of …

Persistent SARS-CoV-2 infections may act as viral reservoirs that could seed future
outbreaks,,,–, give rise to highly divergent lineages,–and contribute to cases with post-acute …

Background Estimates of immunity and severity for the SARS-CoV-2 omicron subvariant BA.
5 are important to assess the public health impact associated with its rapid global spread …

There is a public health need to understand how different frequencies of COVID-19 booster
vaccines may mitigate the risk of severe COVID-19, while accounting for waning of …

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants of concern (VOCs)
now arise in the context of heterogeneous human connectivity and population immunity …

The heterogeneity of the SARS-CoV-2 immune responses has become considerably more
complex over time and diverse immune imprinting is observed in vaccinated individuals …

Three and a half years into the coronavirus disease 2019 (COVID-19) pandemic, the nature
and durability of protection against severe acute respiratory syndrome coronavirus 2 (SARS …

The presence of symptoms after an acute SARS-CoV-2 infection (long-COVID) has become
a worldwide healthcare emergency but remains underestimated and undertreated due to a …