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Varicella postexposure prophylaxis in children with cancer: urgent need for a randomised controlled trial

We welcome the interest of Samuelson et al 1 in our work on prevention of varicella in children with cancer.2 However, they misrepresent our method for estimating the incidence of varicella zoster virus (VZV) exposure requiring post-exposure prophylaxis (PEP), which did not rely on consultant recollection. As described in detail in our paper, this was achieved by painstaking scrutiny of varicella zoster immunoglobulin …