Opioids are drugs that bind to specific opioid receptors present in our:

What measures can be taken to maintain public health against water-borne diseases?

Which substance,when present in higher amounts in the body,leads to a fever-like condition?

Which factors are necessary in achieving good health?

Which of the following components are present in a vaccine?

Statement $I$: $ELISA$ works on the principle of antigen-antibody interaction.
Statement $II$: Infection by a pathogen can be detected by the presence of antigens or by detecting the antibodies synthesized against the pathogen.