Guess the missing words in the following sentence: As the pandemic ____, the need for a vaccine has become increasingly ____.
As the pandemic worsens, the need for a vaccine has become increasingly urgent.
Complete the following task based on the instruction and optional input provided.### Instruction:
Guess the missing words in the following sentence: As the pandemic ____, the need for a vaccine has become increasingly ____.

### Output:
As the pandemic worsens, the need for a vaccine has become increasingly urgent.