Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Name the least age for the 1st dose for 3 doses of 2-3 drops

### Inputs:
table_name: table, columns: ['Vaccine', 'Minimum Age at 1st Dose', 'Number of Doses', 'Dose', 'Minimum Interval Between Doses', 'Route']

### Response:
SELECT Minimum Age at 1st Dose FROM table WHERE Number of Doses = 3 doses AND Dose = 2-3 drops