Nope. Which is why there are 3 classes beside the cleric that can all heal to some degree or another if they choose to.
Wizard (by being an Elf)
In addition there are 3 classes that specifically let you multiclass to cleric and get the cleric spells, so at second level the Bard, Paladin, and Ranger can all become decent fill-in clerics.
Healing is still a thing and the cleric is still best at it, but there are a number of ways to get healing without the cleric.