Answer
Microbiology was Waksman's area of expertise. He was a pioneer in the field, renowned for his groundbreaking work on antibiotics. Waksman's research led to the discovery of streptomycin, the first antibiotic effective against tuberculosis, and for which he received the Nobel Prize in Physiology or Medicine in 1952. His contributions revolutionized the treatment of infectious diseases and paved the way for the development of numerous other antibiotics.