FYI Not yet "proven" but enough for a caution.
Scientists shocked to learn that shingles vaccines can transform vaccinated people into “carriers” who spread infectious disease
The scientists note that the vaccine package’s insert notes that recipients should avoid contact with newborn infants, pregnant women who’ve not had chicken pox, and immuno-compromised individuals for an unspecified amount of time following inoculation.
According to the research team, the presence of VZV DNA in saliva for up to 28 days after vaccination suggests that there is a potential for people who have recently received the shot to transmit VZV to other people.
As Mike Adams notes, for immuno-compromised patients, the Johns Hopkins Patient Guide cautions against contact with children who have been recently vaccinated and to “Tell friends and family who are sick, or have recently had a live vaccine (such as chicken pox, measles, rubella, intranasal influenza, polio or smallpox) not to visit.”