Merck Stock Soared Great expectations for Merck (MRK) future growth and the future of novel treatments for patients with severe devastating and life-threatening diseases. Keytruda - Merck's cancer immunotherapy drug, has reached a milestone and molnupiravir - its COVID-19 pill, sales revenues are expected to generate $5 billion to $7 billion through 2022, subject to emergency use authorization, at the end of November 2021. The …