The governments of Turkey and Brazil have been testing the Chinese Covid vaccine but they have provided little data. They state that the vaccine is safe and effective, but the numbers tested are under 2000 and do not approach the +35K clients in the Pfizer and Moderna vaccines. One of the pluses of CoronaVac, as Sinovac calls its vaccine, is that it is made from killed coronaviruses. This is a tried and true method of making vaccines.
Countries are looking for additional vaccines that won’t need the extraordinary cold chain logistics of the first vaccines. Yet the researchers have still been stingy with the results data and their research has not been put before peer evaluators.