Yeah right GG
shingles can give a susceptible person chickenpox
but you only get shingles from yourself in reactivation
This was worked out in the fifties - by my father's elder partner
Edgar Hope Simpson when he was a GP in cirencester
( and ironically outlived his junior partner my father by thirty y )
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC261759/