i am a guidebook for guests. i can make an indoorsy person, outdoorsy. i give families a home, not just a place to stay. i am a vrbo host. ♪ ♪ new tonight. a potential game-changer in the fight against covid. and this is the first pill to fight infection. merck announcing an experimental drug. i will try to pronounce it. i'm sorry. cuts the risk of hospitalization and death by 50%. it would fight the virus early after diagnosis and aim to prevent symptoms from developing after exposure. so like i said, it would completely be a game changer and merck will seek emergency authorization, the eua from the fda as soon as possible. outfront now, dr. sanjay gupta,