defences of the body against pathogens.

Question 1

how can spread be reduced/ prevented?

Answer 1

practising hygiene.
destroying vectors.
isolating infectious diseases.
vaccination.

Question 2

what are the bodily defence in and out of the body to protect it from disease?

Answer 2

skin, nose, trachea, bronchi and stomach have features to stop pathogens entering.
if they do enter then the immune system will attack it.