Passive immunization involves the administration of pre-formed antibodies. When polio drops are administered orally into the body,what do they contain?

$DPT$ vaccine doses are administered at specific intervals after birth. Identify the correct sequence for the $1^{st}$, $2^{nd}$, and $3^{rd}$ doses of $DPT$ from the following list:
$I$. $6 \; \text{weeks}$ after birth
$II$. $10 \; \text{weeks}$ after birth
$III$. $14 \; \text{weeks}$ after birth
$IV$. $24 \; \text{weeks}$ after birth
$V$. $29 \; \text{weeks}$ after birth

Hashimoto's disease is a/an...

$A$ physical or functional change that causes discomfort or disability under normal conditions is known as:

Which of the following is an autoimmune disease?

Which of the following established the scientific basis of vaccination?