Vaccine
vækˈsiːna preparation that is administered (usually by injection) to stimulate the body's immune response against a specific infectious agent, thereby preventing disease or reducing its severity
कोविड-19 वैक्सीन ने लाखों लोगों की जान बचाई।
The COVID-19 vaccine saved millions of lives.
Vaccines can be made from weakened or inactivated germs, or parts of germs, such as proteins.
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💡Pro Tip
Vaccine Types
Vaccines can be live-attenuated, inactivated, subunit, conjugate, or mRNA-based, each with different mechanisms of action.
⚡Gold Rule
Vaccine Safety
Vaccines undergo rigorous testing for safety and efficacy before public use.
📖Word Origin
From Latin vaccinus, meaning 'pertaining to cows', from vacca 'cow', because the first vaccine was derived from cowpox.
📝Usage Notes
The term 'vaccine' is often used interchangeably with 'vaccination' in common speech, though they refer to the substance and the act of administering it, respectively.