In which way has the study of biology helped us to control infectious diseases?

Lymphocytes are seen in large numbers at sites of inflammation because

Match the correct pairs:

Column $1$	Column $2$
$(i)$ Salmonella typhi	$(p)$ Malaria
(ii) Plasmodium	$(q)$ Typhoid
(iii) Entamoeba histolytica	$(r)$ Ringworm
(iv) Epidermophyton	$(s)$ Amoebiasis

Which of the following is a mental disease?

How does the transmission of each of the following diseases take place?
$(a)$ Amoebiasis
$(b)$ Malaria
$(c)$ Ascariasis
$(d)$ Pneumonia

Read the following statements carefully and identify the incorrect statement$(s)$.
$(1)$ In $AIDS$,the count of $CD4$ cells increases.
$(2)$ Malignant tumors are cancerous tumors.
$(3)$ Pneumonia is a life-threatening disease.
$(4)$ Asthma can be caused by allergies.
$(5)$ Antibodies are made up of $\gamma$-globulin proteins.