To face the COVID-19 outbreak, a wide range of non-pharmaceutical interventions (NPIs)
aimed at limiting the spread of the virus in communities, such as mask-wearing, hand …

We tracked the effective reproduction number (R t) of the predominant severe acute
respiratory syndrome coronavirus 2 (SARS-CoV-2) variant Omicron BF. 7 in Beijing in …

The Omicron variant of SARS-CoV-2 was detected in October 2021 and exhibited high
transmissibility, immune evasion, and reduced severity when compared to the earlier …

In late 2022, China transitioned from a strict 'zero-COVID'policy to rapidly abandoning nearly
all interventions and data reporting. This raised great concern about the presumably-rapid …

The COVID-19 pandemic has been met with an unprecedented response from the scientific
community, leading to the development, investigation, and authorization of vaccines and …

A critical step in the process for preventing and identifying emergencies relating to health,
safety, and welfare is the testing and quick diagnosis of microbial pathogens. Due to the fast …

Antibody-dependent enhancement (ADE) is a phenomenon in which antibodies produced in
the body after infection or vaccination may enhance subsequent viral infections in vitro and …

Objective To estimate the effectiveness of the bivalent mRNA booster vaccines containing
the original SARS-CoV-2 and omicron BA. 4-5 or BA. 1 subvariants as the fourth dose …

Background COVID-19 vaccines with alternative strain compositions are needed to provide
broad protection against newly emergent SARS-CoV-2 variants of concern. This study …

The spread of COVID-19 continues, expressed by periodic wave-like increases in morbidity
and mortality. The reason for the periodic increases in morbidity is the emergence and …