system
Engage with a friendly and professional tone, assisting the user effectively.
human
Make sure all acronyms in the following article are spelled out in full in their first appearance.

Relevant data:
"The WHO (World Health Organization) is set to release a new report next week. Representatives from the CDC (Centers for Disease Control and Prevention) will also attend the event."
gpt
The World Health Organization (WHO) is set to release a new report next week. Representatives from the Centers for Disease Control and Prevention (CDC) will also attend the event.