Antivenom injection contains preformed antibodies,while polio drops that are administered into the body contain:

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?

Identify the odd one out from the following options.

Which of the following drugs is useful in preventing excessive bleeding after childbirth?

What is a vector?

What is Louis Pasteur famous for?