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

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'