Answer:
Cell membrane
Explanation:
"The cell membrane functions as a semi-permeable barrier, allowing a very few molecules across it while fencing the majority of organically produced chemicals inside the cell."
Answer:
Pertussis.
Explanation:
Vaccine is given as the preventable measure for the particular disease. Vaccine may contain the weakened or killed antigen, the epitope part of any antigen and the particular DNA or protein.
Pertussis is also known as whooping cough that affects the respiratory system of an individual and can cause pneumonia as well. The vaccine for the pertussis is available in the hospitals for the prevention of pertussis in the future generation.
Thus, the correct answer is pertussis.
the answer is >skin< antibodies are used to combat infection