Stryczyńska-Kazubska, Joanna, et al. “Can a Healthcare Worker Be a Source of an Infection of a Patient – a Risk of Transmitting the Chickenpox and Shingles Virus VZV by the Staff of Hospital Wards – Preliminary Research Findings”. Journal of Medical Science, vol. 86, no. 1, Mar. 2017, pp. 30-35, doi:10.20883/jms.2017.128.