News reports last spring about a promising ovarian cancer vaccine raised hopes among some patients at Memorial Sloan Kettering Cancer Center in New York City. “I did have a lot of patients knock on my door saying, ‘Can I get this vaccine?’ ” medical oncologist Dmitriy Zamarin, MD, PhD, recalled. His response: “We have to be very cautious about interpretation of this data … it’s a very small study of only 25 patients.”