The Brazilian health regulator's decision comes after the vaccine maker informed the South American country about the termination of its pact with its partners in that country.
The termination of the pact comes after the deal with the Brazilian government for supply of 20 million doses of the vaccine landed in controversy and attracted investigation by authorities in that country.
A World Cup qualifier between Argentina and Brazil was suspended amid farcical scenes on Sunday after Brazilian health authorities accused a number of Premier League players of violating the country's COVID-19 quarantine rules.
While it is not clear whether the volunteer had received the vaccine or a placebo shot during the trial, Anvisa has refused to reveal any more information citing reasons of medical privacy, CNN reported.
On World Cup game days, many Brazilians get time off work to pack into bars and restaurants or gather for home barbecues to watch the games, rooting for a national team seeking its sixth world champion title in Qatar.
"We suspended the deal as a simple preventive measure, since there are complaints that could not be explained well by the complainant, so we opened a preliminary investigation last week," said Rosario, head of the Federal Comptroller General.
Reacting to it, the vaccine maker said it is working towards resolving the issues cited during the inspection and the order of 20 million doses from the Brazilian government is still active.
The termination of the MoU came after the deal with the Brazilian government for supply of 20 million doses of the vaccine landed in controversy and attracted investigation by authorities in that country.
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