CanSino Biologics (688185.SH) announced it has obtained clinical trial approval from China's National Medical Products Administration (NMPA) for its recombinant trivalent poliomyelitis vaccine (Sf-RVN cell). The regulatory clearance permits the company to initiate clinical studies evaluating the vaccine's efficacy in preventing poliomyelitis caused by type I, II, and III poliovirus infections. This milestone advances the company's innovative vaccine pipeline targeting preventable diseases with significant public health impact.