Dear student,
(i) Vaccination can be define as protection of the body from communicable diseases by the administration of some agents that mimic the microbe. The agent can be the suspension of killed or attenuated microbes, or a substance that mimics the disease causing microbes.
(ii) Chicken pox vaccine for Chicken pox disease and Flu vaccine for Influenza.
(iii) This shows the responsible, caring and sensitive nature of Kushal as being a father and his awareness about the importance of vaccination.
Regards.