A Chinese vaccine maker has announced positive early results for its messenger RNA jab, as Covid-19 spreads rapidly across a population that has been inoculated with more traditional vaccines.
CanSinoBio on Friday said its vaccine had elicited 23 to 29 times more antibodies than an inactivated jab when given as a booster to people who had already received three shots.
The “phase 2b” trial of more than 400 people — which usually comes before a gold-standard phase 3 trial — showed positive results against the Omicron variants BA.1 and BA.5.
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