Market share of DTP vaccine manufacturers in China 2020
Only four pharmaceutical companies manufactured DTP (diphtheria/tetanus/pertussis) vaccines in China in 2020. Sinopharm's subsidiaries, including the Wuhan Institute of Biological Products, and Chengdu Institute of Biological Products contributed more than 75 percent of all DTP vaccines produced in the country. Olymvax, a pharmaceutical company founded in 2009, produced six percent of the overall volume.