The health regulator, Anvisa, said the approval was based on studies by Pfizer that "indicated the vaccine's safety and effectiveness for this age group."
The Sinovac vaccine has been authorised in 32 countries and jurisdictions, with 260 million doses distributed, the SAGE experts said.
"We are very confident that 2 doses of CoronaVac are efficacious in preventing PCR confirmed COVID19 in adults (18-59 years)," SAGE said in an assessment posted on the WHO website.
Under Pazuello, the health ministry decided to release reserves of second doses to be administered as first doses, in a bid to accelerate Brazil's vaccination campaign.
Around 525,000 doses of the AstraZeneca jab were also due to arrive Monday as part of the COVAX global inoculation programme and will also be offered to healthcare workers.
So far, only the American-German Pfizer/BioNTech jab has been administered, with health care workers across Mexico and teachers in the southern part of the country having received the jab.
The amount includes $683 million for technology upgrades and new facilities at its plant in Silverton, a suburb of Pretoria, and $365 million to upgrade tooling at major supplier factories.
"(The second consignment) was approved in China," Erdogan told reporters in Istanbul. "It is highly probable that it could come by the end of this week. We expect 10 million to come."
Some 600,000 people were vaccinated in two days when the rollout began just over a week ago, but the pace later slowed.