The Indian ministry of health has shared a document responding to claims that India’s indigenously developed Covid-19 vaccine, Covaxin, contains the serum of calves, Hinduism’s most holy animal.

In a tweet on Wednesday, India’s Ministry of Health countered “twisted and misinterpreted” information concerning the widely used Covaxin jab. The post confirms that calf serum is used in the “preparation/growth” of cells for the vaccine but is not in the final shot.

“Newborn calf serum is used only for the preparation/growth of vero cells,” which are a lineage of cells used in cell cultures. “Different kinds of bovine and other animal serum are standard enrichment ingredient used globally for vero cell growth,” the tweet read, adding that similar techniques are used for polio, rabies, and influenza shots.

The statement adds that the vero cells are washed with water and chemicals so there is no trace of calf serum. “Hence, the final vaccine (Covaxin) does not contain newborn calf serum at all and the calf serum is not an ingredient of the final vaccine product.”

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The response came after Congressman Gaurav Pandhi claimed in a now-deleted tweet that the government had admitted in a document that the vaccine did contain calf serum. “THIS IS HEINOUS” he wrote, referencing Hinduism’s sacred belief in cows as deity-like beings.


The tweet and the document within it were widely shared around India, including by a number of prominent politicians.