Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_28 (minimum_age_at_1st_dose VARCHAR, number_of_doses VARCHAR, dose VARCHAR)
### Question:
Name the least age for the 1st dose for 3 doses of 2-3 drops
### Answer:
SELECT minimum_age_at_1st_dose FROM table_name_28 WHERE number_of_doses = "3 doses" AND dose = "2-3 drops"