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 Has_allergy (StuID VARCHAR)
### Question:
Show all student IDs who have at least two allergies.
### Answer:
SELECT StuID FROM Has_allergy GROUP BY StuID HAVING COUNT(*) >= 2