CanSino Biologics Inc. announced that, the phase I clinical trial for the Absorbed Tetanus Vaccine developed by the Company, was officially initiated recently and the first trial patient case has been formally enrolled. The Absorbed Tetanus Vaccines is fermented with animal-free culture medium and safer, and the stable industrial scale processes have been identified. This vaccine is mainly used for non-neonatal tetanus prevention, which will further enrich the Company's product pipeline and enhance its core competitiveness.