State two examples of viral diseases

(i) State two examples of viral diseases.
(ii) After an injury, an injection is given immediately. What is it and why is it given?
(iii) What type of food is advised when we fall sick and why?

(i) AIDS and dengue fever.
(ii) The injection is of anti-tetanus serum. It is given immediately after injury because the bacteria that
cause tetanus enter the body through a cut or wound in the skin. So, to avoid its infection, the injection is given immediately.
(iii) Bland and nourishing food is advised during sickness because such food is easily digestible, provides sufficient energy and nutrients for regeneration /of cells and tissues.