In this study, we aimed to determine the effect of COVID-19 vaccination on 3-month immune
response and durability after natural infection by the Omicron variant and to assess the …

It is critical to determine the real-world performance of vaccines against coronavirus disease
2019 (COVID-19) so that appropriate treatments and policies can be implemented. There …

The effectiveness of COVID-19 vaccines wanes over time and the emergence of the SARS-
CoV-2 Omicron variant led to the accelerated expansion of efforts for booster vaccination …

Evidence on the effectiveness of COVID-19 vaccines among people who recovered from a
previous SARS-CoV-2 infection is warranted to inform vaccination recommendations. Using …

The new Omicron variant of SARS-CoV-2, first identified in November 2021, is rapidly
spreading all around the world. Omicron has become the dominant variant of SARS-CoV-2 …

We compared immune responses against the omicron variant of SARS-CoV-2 after a third
dose of the coronavirus disease 2019 (COVID-19) vaccine between people living with …

Using a three-prefecture, two-variant COVID-19 outbreak in Henan province in January
2022, we evaluated the associations of primary and booster immunization with China …

Limited data are available on the effectiveness of COVID-19 vaccines used in China in real-
world outbreaks–especially against Omicron variants in vaccinated individuals. Two …

In this Journal, Au and colleagues previously compared the potency of CoronaVac in the
seroprotection against SARS-CoV-2 Alpha, Beta, Gamma, and Delta variants, 1 we went on …

SARS-CoV-2 Omicron infections are common among individuals who are vaccinated or
have recovered from prior variant infection, but few reports have immunologically assessed …