<span style="color: #222222;">Prime Minister Narendra Modi has thanked the  Microsoft co-founder Bill Gates for appreciating the efforts of Indian scientists, health workers and innovators in achieving  one billion vaccine milestone. In his reply to a tweet of  Bill Gates, Mr Modi said, India remains a steadfast partner in global efforts towards fighting this pandemic. In his post, Bill Gates  appreciated the  achievement of administering one billion vaccine doses  . He also said, it is a testament to India's innovation, ability to manufacture at scale, and the efforts of millions of health workers backed by CoWIN. Mr Gates also congratulated Prime Minister Narendra Modi and Union Health Minister Mansukh Mandaviya for this achievement.</span><br />''