$NMEP$ stands for

$DPT$ vaccine provides immunity against which of the following?

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?

The poisonous substances commonly produced by bacteria are known as

The first dose of Oral Polio Vaccine $(OPV)$ and Hepatitis-$B$ vaccine is given to a child at:

Streptomycin was first isolated in $1944-45$ by