In which of the following sets are all organisms considered vectors?

Which diagnostic technique is based on antigen-antibody interactions?

$A$ physical or functional change that causes discomfort or disability under normal conditions is known as:

Consider the following statements:
$I.$ People should get vaccinated to avoid infection.
$II.$ Vaccination is available against polio,cholera,typhoid,tuberculosis,and many other diseases.
$III.$ Eradication of vectors is necessary for diseases like malaria and filariasis.
$IV.$ Dengue and chikungunya are both spread by $Culex$ mosquitoes.
Which of the statements given above are correct?

Which disease has been eradicated from India?

Filaria,malaria,dengue fever,sleeping sickness,and yellow fever are transmitted by: