Parçada geçen önemli kelimelerin ingilizce tanımları ve örnek kullanımları aşağıdadır:
protectedIf you are immune to a disease, you will not get it.
a substance that is given to people to stop them from getting a particular diseaseDoctors worried that there would not be enough vaccine for everyone who needed it.
a test of something new to find out if it is safe, works correctly, etcThe drug is currently undergoing clinical trials.
to make a judgment about the quality, size, value, etc of somethingThe tests are designed to assess a child's reading skills.