Lysozymes are found in

Which of the following components are present in a vaccine?

$A$: Many countries have banned the use of antibiotics in cattle feed.
$R$: Dairymen give antibiotics in the feed to cattle,and it becomes a breeding ground for antibiotic-resistant bacteria.

Which of the following statements is $NOT$ true regarding antibiotics?

Good health results in:

The period from the entry of pathogens into the body and their multiplication to the appearance of the initial symptoms of a disease is known as: