Which disease has been completely eradicated through the immunization program?

Select the correct option to fill up the blanks.
$(i)$ Diseases which are easily transmitted from one person to another,are called $.....$ diseases.
$(ii)$ In human body,parasite of malaria initially multiplies within the $........$ and then attack the $......$
$(iii) ......$ is the yellowish fluid secreted by mother during the initial days of lactation.
$(iv) ......$ and $.......$ are the primary lymphoid organs.

Who discovered interferons?

Which of the following is true regarding the use of $ELISA$ for the diagnosis of viruses?

The discovery of the fungicide known as Bordeaux mixture is associated with which of the following diseases?

Eradication of smallpox has been possible due to the following facts except: