A new born baby who receives $IgA$ form its mother's milk develops
Naturally acquired active immunity
Artificially acquired active immunity
Naturally acquired passive immunity
Artificially acquired passive immunity
Injections of antitoxin or toxoid serum is given to prevent
Nicotine acts as a stimulant because it mimics the effect of
Blood circulation was discovered by
Morphine is extracted from
The viruses infect the host cells. By the induction of viruses the host cells produce the