No comma before the first or after the last item in a series

Though commas are required between items in a series, do not place them either before or after the whole series.

Example sentence with editing. Original sentence: Other causes of asthmatic attacks are, stress, change in temperature, and cold air. Revised sentence: Other causes of asthmatic attacks are stress, change in temperature, and cold air.

Exercises:

Misuses of the comma 1

Misuses of the comma 2