Nakagawa H, Katsushima N
Tohoku J Exp Med. 1978 Dec;126(4):393-5. doi: 10.1620/tjem.126.393.
Seven children with acute leukemia were given a live attenuated varicella vaccine and successfully seroconverted with minimal clinical reactions. One of them was vaccinated immediately after the contact with natural varicella and successfully prevented from natural infection.