Participants who received a CanSinoBIO booster dose three to six months after a second Sinovac shot showed a 78-fold jump on average in neutralizing antibody levels two weeks later, according to a paper published on Monday before a peer review.
By contrast, those who received a Sinovac booster shot showed a 15.2-fold increase in neutralizing antibody levels, researchers from local disease control authorities, CanSinoBIO and other Chinese institutions said in the paper.
One dose of Sinovac followed by a CanSinoBIO booster at intervals of one or two months led to a 25.7-fold increase in neutralising antibody levels, while two doses of Sinovac induced a 6.2-fold increase.