tetano
Editor, Senior Moderator
Shirley LL Kwok[SUP]1,2[/SUP] , Samuel MS Cheng[SUP]1,3,4[/SUP] , Jennifer NS Leung[SUP]5[/SUP] , Kathy Leung[SUP]1,2[/SUP] 
, Cheuk-Kwong Lee[SUP]5,*[/SUP] , JS Malik Peiris[SUP]1,3,4,*[/SUP] , Joseph T Wu
The mRNA vaccine Comirnaty and the inactivated vaccine CoronaVac are both available in Hong Kong’s COVID-19 vaccination programme. We observed waning antibody levels in 850 fully vaccinated (at least 14 days passed after second dose) blood donors using ELISA and surrogate virus neutralisation test. The Comirnaty-vaccinated group’s (n = 593) antibody levels remained over the ELISA and sVNT positive cut-offs within the first 6 months. The CoronaVac-vaccinated group’s (n = 257) median antibody levels began to fall below the cut-offs 4 months after vaccination.
full article
https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2022.27.2.2101197
, Cheuk-Kwong Lee[SUP]5,*[/SUP] , JS Malik Peiris[SUP]1,3,4,*[/SUP] , Joseph T WuThe mRNA vaccine Comirnaty and the inactivated vaccine CoronaVac are both available in Hong Kong’s COVID-19 vaccination programme. We observed waning antibody levels in 850 fully vaccinated (at least 14 days passed after second dose) blood donors using ELISA and surrogate virus neutralisation test. The Comirnaty-vaccinated group’s (n = 593) antibody levels remained over the ELISA and sVNT positive cut-offs within the first 6 months. The CoronaVac-vaccinated group’s (n = 257) median antibody levels began to fall below the cut-offs 4 months after vaccination.
full article
https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2022.27.2.2101197
