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Research Article 2023-10-25CC BYFree full text

Relative vaccine effectiveness of a CoronaVac booster dose in preventing symptomatic SARS-CoV-2 infection among healthcare workers during an Omicron period in Azerbaijan, January-August 2022

Iris Finci, Madelyn Yiseth Rojas Castro, Nabil Seyidov, Samir Mehdiyev, C. Jason McKnight, Barbara Mühlemann +6 more

Among Azerbaijani healthcare workers (HCWs), compared to primary vaccine series, CoronaVac booster relative vaccine effectiveness was 60% (95% CI:25-79) and 79% (95% CI:44-92) against symptomatic and medically attended illness, respectively, during an Omicron BA.1/BA.2 period. Our results support timely CoronaVac booster uptake among Azerbaijani HCWs to reduce morbidity.

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Research Article 2022-06-21CC BYFree full text

Kinetics of neutralising antibodies against Omicron variant in Vietnamese healthcare workers after primary immunisation with ChAdOx1-S and booster with BNT162b2

Nguyen Van Vinh Chau, Lam Anh Nguyet, Nguyen Thanh Dung, Vo Minh Quang, Nguyen Thanh Truong, Le Mau Toan +19 more

We studied the development and persistence of neutralising antibodies against SARS-CoV-2 ancestral strain, and Delta and Omicron (BA.1 and BA.2) variants in Vietnamese healthcare workers (HCWs) up to 15 weeks after booster vaccination. We included 47 HCWs with different pre-existing immune statuses (group 1 (G1): n=21, and group 2 (G2): n=26 without and with prior breakthrough Delta variant infection, respectively…

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