His science and research minister, Marcos Pontes, a former astronaut, announced the federal government had "invested" in several Brazilian vaccines and had already requested authorization to begin clinical trials for one of them.
That one has been developed by the Ribeiro Preto faculty of medicine in Sao Paulo.
Pontes said the government will soon seek authorization for clinical trials for two more vaccines.
"It must be a coincidence that (Doria) presented this other possibility in Sao Paulo, and it's good for the country, we need several national vaccines," said Pontes.
Brazil has faced a shortfall in vaccine doses due to import delays at the worst possible time, with record numbers of daily infections and deaths registered this week.
It has now recorded 12.3 million cases -- 300,000 of them fatal -- among its 212 million population.
The country only began vaccinating in mid-January. Other than CoronaVac, the only other authorized jab is AstraZeneca.
But the competing projects should allow Brazil to accelerate its vaccine rollout that has been widely criticized for being slow.
Butantan will be able to produce 40 million doses from May to July and 100 million by the end of the year, Doria said.
While the CoronaVac shot is produced using imported materials, ButanVac will be "a vaccine entirely developed and produced in Brazil," added Doria.
ButanVac, which will also be produced in Thailand and Vietnam and distributed to poorer countries, "is the response to those that deny science and life," said Doria, in a barb at Bolsonaro.
The far-right leader spent months downplaying the seriousness of the coronavirus. He opposed preventative measures such as mask-wearing, restrictions on the economy and even cast doubt on the efficacy of CoronaVac.
This story has been published from a wire agency feed without modifications to the text. Only the headline has been changed.
Subscribe to Mint Newsletters
* Enter a valid email
* Thank you for subscribing to our newsletter.
Never miss a story! Stay connected and informed with Mint.
our App Now!!