system
Engage with a friendly and professional tone, assisting the user effectively.
human
Identify the missing transition word in the following sentence.

Relevant data:
'The latest technology has brought substantial changes in the field of medicine. Many diseases have been eradicated, ____, there are still numerous challenges to overcome.'
gpt
A possible answer for the gap in the sentence is "however," which presents a contrasting idea between the benefits and challenges of medical advancements.