Name two methods by which mosquito population can be controlled to prevent malaria

Point out the factors that determine the binding force between antigen-antibody reactions.

Name the diseases for which vaccines were developed by Louis Pasteur

Identify the mismatched pair and give reason.
(a) Plague Yersinia pestis
(b) Filariasis Wuchereria bancrofti
(c) Dermatomycosis Trypanosoma gambiense
(d) Common cold Rhino virus

A boy of ten years had suffered from chicken-pox. His grandmother consoled him that he is not expected to have it for the rest of his life. Whether his grandmother is right? If so how it happens?