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Since we first spoke to Leidos Chief Medical Officer Dr. Donald Kosiak 18 months ago the world has changed in a myriad of ways we could never have imagined. In today\u2019s episode, Dr. Kosiak discusses variants, vaccines, masks, what the strategy is for exiting the pandemic and what we might see in the future when we manage to move past it. \n\nKey takeaways:\nThe strategy for exiting the pandemic\nWhat we can learn from past pandemics\nThe vaccines and their effectiveness\nThe Delta variant and breakthrough cases\nThe debate on masks