Clive Barker's The Plague

Clive Barker's The Plague (on Hulu, free on Tubi) is a 2006 horror film. It's good enough and worth watching once if you're looking for October/Halloween fare. Plot from Wikipedia:

In 1983, one day all of the world's children under the age of nine simultaneously fall into a catatonic state. For the next ten years, every child who is born, is born in a state of catatonia. During this state, the children experience seizures twice a day which develops and maintains muscle mass.

In 1993, all the children wake up in zombie-like state, unrelentingly pursuing, attacking and murdering all adults.

trailer: