While wastage of Covid-19 vaccine doses in several states has attracted flak from the central health authorities, Kerala has emerged as one of the few states with zero Covid-19 vaccine wastage so far. It has, in fact, reported negative wastage of Covid-19 vaccines by making use of “extra dose”. <br /> <br />Taking to Twitter, Kerala Chief Minister Pinarayi Vijayan said, “Kerala received 73,38,806 doses of vaccine from the Centre and provided 74,26,164 doses, even using the extra dose available as a wastage factor in each vial.” <br /> <br />He wrote on Twitter: “Our health workers, especially nurses, have been super-efficient and deserve our wholehearted appreciation!”