Задание №84503 ЕГЭ Английскому языку

Преобразуйте, если это необходимо, слово «TREAT» так, чтобы оно грамматически соответствовало содержанию текста.

Penicillin has a magic ability to cure people of many bacterial infections. It was first used as a ___________ to cure wounded soldiers during the World War II. It has saved so many lives that it is easy to understand why it was once called a ’miracle drug’.