In 1941, he and Chain treated their first patient, Albert Alexander, who had had a small sore at the corner of his mouth, which then spread, leading to a severe facial infection involving streptococci and staphylococci. His whole face, eyes and scalp were swollen to the extent that he had had an eye removed to relieve the pain. Within a day of being given penicillin, he started to recover. However, the researchers did not have enough penicillin to help him to a full recovery, and he relapsed and died. Because of this experience and the difficulty in producing penicillin, the researchers changed their focus to children, who could be treated with smaller quantities of penicillin.