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Inverse
Inverse
Health
Jennifer Girotto, and ,The Conversation

Certain U.S. states may be close to losing herd immunity to a deadly virus


Given recent headlines, you may wonder why polio is even an issue in 2022. For more than 60 years, vaccines against the poliovirus have protected virtually everyone in the United States from the disease. Due to an enormously successful polio vaccination campaign beginning in the 1950s when the first polio vaccines became available, by 1979, polio was considered eliminated in the U.S.

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