Does a creature engaged in melee combat benefit from cover when it is targeted by a ranged attack?

@JeremyECrawford Does a creature engaged in melee combat benefit from cover when it is targeted by a ranged attack?

— John Kramer (@metalsheep714) October 18, 2016

Take a look at the rules on cover (PH, 196). Other creatures—friend or foe—give you half cover. #DnD https://t.co/pzQ3qLGzyI

— Jeremy Crawford (@JeremyECrawford) October 18, 2016

@JeremyECrawford Does this only apply if the creature is between the target and the shooter? Or does it apply to all within 5 ft?

— John Kramer (@metalsheep714) October 18, 2016

A target can benefit from cover only when an attack or other effect originates on the opposite side of the cover (from PH, 196). #DnD https://t.co/FdpBDzG79K

— Jeremy Crawford (@JeremyECrawford) October 18, 2016