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Reaction. if a third booster is required, will i still be guarded if i dont take it. and i had a similar question to something brought up previously. do you think it would be safe to try different brands such as pfizer and j&j, after having moderna. >> the first part about shingles, there have been cases of people without immune disease getting shingles or showing signs of shingles, which is basically chickenpox virus which reactivates at some point in life. theres been no definitely association...