NEWS RELEASE  | HART DISTRICTAll students entering seventh grade will be required to show proof that they received a pertussis booster (Tdap) shot before entry into the 2013-14 school year. Don’t miss a thing. Get breaking Santa Clarita news alerts delivered right to your inbox. “It’s important that incoming seventh-graders see their doctor and get immunized,” said Vicki Engbrecht, assistant superintendent of ...

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