How many kinds of COVID-19 vaccines are there in the world?

At present, at least 18 vaccines have been urgently approved for marketing by at least one government medical regulatory agency: 3 RNA vaccines: Pfizer, Mardner, Worwa coxsackievirus pneumonia-19 vaccine; There are at least 6 kinds of inactivated vaccines, namely Sinopharm Holdings, CoVIAC, QazVac, CoVIAC New, Kexing and Shenzhen Kangtai; Four viral vector vaccines: "Satellite V", Oxford AstraZeneca, Kangxinuo and Johnson & Johnson.