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Vaccine effectiveness declines over time, studies say; Washington implements strict teacher vaccine mandate: Latest COVID-19 updates

Elinor Aspegren, USA TODAY Comments Off on Vaccine effectiveness declines over time, studies say; Washington implements strict teacher vaccine mandate: Latest COVID-19 updates

Protection provided by COVID-19 vaccines declines over time, studies show. Washington is implementing strict teacher vaccine mandates. Latest updates.

     
Elinor Aspegren, USA TODAY
http://api-internal.usatoday.com.akadns.net

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