________is a preventive treatment for certain medical diseases. These are diseases that are caused by infections and spread from person-to-person.
vaccine
______ is the act of giving help to those in need of it. It is a humanitarian act. It involves giving money, goods or time and effort to those who need it. It is done without expecting something in return.
charity
What means to defend or keep safe; shield from danger or harm.
to protect
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