Source: China – South China Morning PostCovid-19 vaccines approved by the World Health Organization can be given in a “mix-and-match” schedule for either the first two doses or as a booster, the agency said on Thursday, confirming a practice many countries have been following out of necessity for months.Countries that use inactivated vaccines approved by the agency for emergency use for initial doses can use mRNA vaccines or vectored vaccines for subsequent doses, according to a preliminary recommendation by immunisation experts…Read More