Politics has erupted in the country over allegations of Covaxin contains newborn calf serum. On this, Congress has sought an answer from the government. At the same time, BJP has retaliated on the allegations of Congress and has termed the allegation of spreading confusion about the vaccine and has as termed it as a great sin. As the controversy over the vaccine escalated, the Health Ministry has stated that calf serum is used in the initial stages. Watch this episode of Shatak Aaj Tak.