HZ is a virus http://www.ncbi.nlm.nih.gov/pubmed/9686247 HZ is a virus https://www.ncbi.nlm.nih.gov/pubmed/9686247 https://www.ncbi.nlm.nih.gov/pubmed/9686247 http://www.ncbi.nlm.nih.gov/pubmed/9686247 https://www.ncbi.nlm.nih.gov/pubmed/9686247 [PubMed]