What means to defend or keep safe; shield from danger or harm.
to protect
______ 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
________is a preventive treatment for certain medical diseases. These are diseases that are caused by infections and spread from person-to-person.
vaccine
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