The world's largest vaccine maker, which manufactures
It currently charges the central government ₹150 per dose for the existing supplies.
The opposition parties had criticised the differential pricing for COVID-19 vaccines, saying it was discriminatory and will benefit only a "few big industrialists" while common people will suffer.
They had demanded the Centre and state governments pay the same price for the COVID-19 vaccine.
Serum Institute of India (SII) in a statement clarified that there was an "inaccurate comparison" done between the global prices of the vaccine with India.
"Covishield is the most affordable COVID-19 vaccine available in the market today," SII said.
The initial prices were kept very low globally as these were based on advance funding given by those countries for at-risk vaccine manufacturing, it added.
"The initial supply price of Covishield for all government immunization programme, including India, has been the lowest", SII said.
Government procurement for countrywide immunization programmes in all countries, including India, has been at a far lower price as the volumes are very large, it added.
Emphasising that the company has to ensure sustainability, SII said, "The current situation is extremely dire; the virus is constantly mutating while the public remains at risk. Identifying the uncertainty, we have to ensure sustainability as we must be able to invest in scaling up and expanding our capacity to fight the pandemic and save lives".
The company went on to add that only a limited portion of SII's volume will be sold to private hospitals at Rs 600 per dose.
"The price of the vaccine is still lower than a lot of other medical treatment and essentials required to treat COVID-19 and other life-threatening diseases", it added.
Earlier this week, Serum Institute had said, "Going ahead, 50% of our capacities will be served to the Government of India's vaccination program, and the remaining 50% of the capacity will be for the state governments and private hospitals."
The government on Saturday exempted basic customs duty on import of