Pazuello said a decision on a deal for Brazil to acquire the planned vaccine is expected by the end of the week, but will depend on the government's chief of staff.
British researchers started testing the experimental shot in May aiming to immunize more than 10,000 people, including older people and children. The vaccine is one of about a dozen in early stages of human testing.
Brazil, where coronavirus infections are still on the rise, is the only country other than the United Kingdom testing the Oxford vaccine. The country counts more than 1 million confirmed cases and more than 52,600 fatalities.
Clinical trials began in Sao Paulo on Monday and will start in Rio de Janeiro on Wednesday. The British Embassy says 5,000 health professionals are being vaccinated.
“We are working directly with the three most promising" vaccines, Pazuello said, naming the Oxford shot, a vaccine under development by American company Moderna and one of the Chinese experiments, which he did not disclose.
Vijay Rangarajan, the British ambassador to Brazil, told The Associated Press he hopes Brazil will “be one of the first countries to receive the vaccine” if it works.
“However, that will depend on when the country will sign the agreement," he said by e-mail. "There is already production capacity for the vaccine of 2 billion doses worldwide. But much of the global production is already purchased.”
On May 21, the United States announced a deal for at least 300 million doses of the Oxford shot, and committed up to $1.2 billion to the effort. On June 13, pharmaceutical company AstraZeneca agreed to supply up to 400 million doses of the experimental vaccine to European Union nations. Other negotiations are ongoing with Russia and Japan, among other countries, the company’s CEO said this month.
The British ambassador also added he wants “to ensure Brazilians can benefit from any vaccine, quickly and not for profit.”
Bolsonaro has been criticized for downplaying his government's response to the pandemic, comparing the disease to “a little flu."
Prior to vaccine trials, Bolsonaro repeatedly touted the use of chloroquine to treat COVID-19, the disease that can be caused by the coronavirus, even as health experts dismissed its efficacy. The U.S. announced May 31 that it would donate 2 million doses of hydroxychloroquine, a similar anti-malarial that is considered less toxic, to the South American nation.
The U.S. also pledged to donate 1,000 ventilators to Brazil. The first 200 ventilators are expected arrive by the end of this week, U.S. Ambassador Todd Chapman told reporters Tuesday in a video call.
Another experimental vaccine in development by Chinese company Sinovac Biotech will be tested in Brazil in July, according to the Sao Paulo state government. Sinovac has a deal with the state’s Instituto Butantan to produce it. Some 9,000 Brazilians are expected to participate.
Earlier Tuesday, a Brazilian federal judge ordered Bolsonaro to comply with local rules to wear a face mask or be fined.
In recent weekends, a sometimes unmasked Bolsonaro has joined throngs of people protesting against Brazil’s Congress and Supreme Court and he has visited bakeries and outdoor food stalls, drawing crowds around him.
Since the end of April, Brazil's federal district has required people to wear face masks in public to help control the spread of the new coronavirus. Failure to comply carries a possible daily fine of $390.
Judge Renato Coelho Borelli said in his ruling that Bolsonaro “has exposed other people to the contagion of a disease that has caused national commotion.”
The Brazilian president did not immediately comment on the decision. An earlier court ruling required him to publish the results of three COVID-19 tests he took early March, and all were negative for the virus. He has not disclosed any tests since then.
Bolsonaro sometimes appears in public events with a mask, unlike some other heads of state, including U.S. President Donald Trump, Mexico’s Andrés Manuel López Obrador and Argentina’s Alberto Fernandez, who has often hugged supporters and taken selfies with them while not wearing a mask, although use of a mask is mandatory in Argentina's capital.
Associated Press writer Mayra Pertossi in Buenos Aires, Argentina, contributed to this report.