The president has been implicated in allegations of irregularities surrounding a 1.6 billion reais ($316 million) contract signed in February for 20 million doses with a Brazilian intermediary for the vaccine's maker, Bharat Biotech.
A Brazilian Senate commission investigating the administration's handling of the pandemic has cited suspicions of overpricing and corruption related to the contract. After allegations of irregularities surfaced, the government suspended the contract.
Brazil has suffered the world's second highest number of COVID-19 deaths.