Examlex
According to the 2011 National Survey on Drug Use and Health, of 18-25-year-old respondents reported at least one instance of illicit drug use in the past year.
Immunization
The process by which an individual's immune system becomes fortified against an agent (known as the immunogen).
Disease-Causing Organism
A pathogen, such as bacteria, viruses, fungi, or parasites, that can infect humans and animals, leading to disease.
Mucous Membranes
The moist tissue linings of various body cavities, including the mouth, nose, throat, and reproductive tract, that protect against infection.
Mechanical Barriers
Physical or structural methods used to prevent or control the entry or exit of harmful substances or organisms in a particular area.
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