CREATE TABLE table_57457 ("Vaccine" CLOB, "Minimum Age at 1st Dose" CLOB, "Number of Doses" CLOB, "Dose" CLOB, "Minimum Interval Between Doses" CLOB, "Route" CLOB)

How many doses for the bacillus calmette-gu rin?
SELECT "Number of Doses" FROM table_57457 WHERE "Vaccine" = 'bacillus calmette-guérin'
SELECT "Number of Doses" FROM "table_57457" WHERE "Vaccine" = 'bacillus calmette-guérin'