Science1991-presentUnited Stateshigh confidence

Hepatitis B cases in the United States have fallen by 99% since the birth dose vaccine was implemented in 1991.

Notes on verification

Confirmed by multiple independent, reputable sources including CDC-cited data, public health institutions, and fact-checking organizations. Minor variation in wording (pediatric vs. all cases) but core statistic is consistent. [tier=silver indep_score=0.875 clusters=4 claim_tier=notable]

Sources