Essay on Vaccines! Essay on the Evolution of Vaccines: Over 200 years after Edward Jenner's discovery (1798) of small pox vaccination, mankind benefits from this process more than ever before. Several new vaccines were evolved and are now made available to eradicate many diseases e.g. Jenner's own first small pox vaccine has finally banished, in our time (1979), small pox [...]
Vaccines: Definition and Types of Vaccines! Definition Vaccine (L. vacca = cow) is a preparation/suspension or extract of dead/attenuated (weakened) germs of a disease which on inoculation (injection) into a healthy person provides temporary/permanent active/passive immunity by inducing antibodies formation. Thus antibody provoking agents are called vaccines. The principle of immunisation or vaccination is based on the property of ‘memory’ [...]