NEW DELHI : After granting tax relief on imported Covid-related medical supplies, government has turned down requests for Goods and Service Tax (GST) relief on domestic production of Covid-vaccines and drugs saying it would be counter-productive to consumers.The difficulty in granting GST exemption to locally produced vaccines and Covid-related drugs is that the raw materials and services used in their production will continue to attract taxes and producers will not be able to use the tax credits for the same.