If World Health are saying do not Mix Vaccines why is Thailand pushing for a Mix dose ??????? https://www.reuters.com/business/healthcare-pharmaceuticals/who-warns-against-mixing-matching-covid-vaccines-2021-07-12/ This is what has been put up for all to see ??????????????????????????????. Sinavac has been used on frontline Health workers and the success has not been great ,but better to have had that over nothing ????? ,you need to make sure that all get to see the response from WHO.