Soumya Swaminathan, Chief Scientist at the World Health Organization (WHO), today assured that the freeze on Bharat Biotech's Covaxin supply does not involve the safety or efficacy of the vaccine, but some issues in manufacturing processes for which corrective actions are being taken. "Once requirements are met, the suspension will be revoked," she told NDTV in an exclusive interview. Earlier this month, the WHO had suspended the supply of Covaxin through United Nations agencies.