Bengaluru: Biocon Executive Chairperson Kiran Mazumdar-Shaw has hit back at Karnataka Chief Minister Siddaramaiah for his recent suggestion that COVID-19 vaccines might be linked to an uptick in heart attack deaths in Hassan district.

The controversy began after Siddaramaiah posted on social media that over 20 people in Hassan had died from heart attacks in the past month. While stating that the government was investigating the matter seriously, the Chief Minister hinted that COVID-19 vaccinations could potentially be a contributing factor. He cited global studies allegedly pointing to increased heart attack risk following vaccination and referred to the "hasty approval" of the vaccines in India.

“Orders were given to this same committee back in February to conduct a thorough study on the reasons behind sudden deaths among young people in the state,” Siddaramaiah wrote. “It cannot be denied that the hasty approval and distribution of the Covid vaccine to the public could also be a reason for these deaths,” he added.

Reacting strongly to these claims, Mazumdar-Shaw took to social media to issue a fact-based rebuttal. “COVID-19 vaccines developed in India were approved under the Emergency Use Authorisation framework, following rigorous protocols aligned with global standards for safety and efficacy. To suggest that these vaccines were ‘hastily’ approved is factually incorrect and contributes to public misinformation," she wrote.

She further stated, “These vaccines have saved millions of lives and, like all vaccines, may cause side effects in a very small number of individuals. It is important to acknowledge the science and data-driven processes behind their development, rather than engage in retrospective blame.”

Her statement has been widely shared online and praised by medical professionals and public health advocates, who warned that such statements from political leaders risk undermining public trust in vaccination programmes.

The Karnataka government has ordered a formal expert probe into the spate of cardiac deaths in Hassan. The committee, initially tasked with studying unexplained deaths among youth earlier this year, has been asked to expedite its findings, which are expected within the next ten days.

The issue has reignited debate over post-pandemic vaccine hesitancy and the responsibility of public figures in shaping discourse around science and health.