Question

wht r the types of vaccines_??​

Answer 1

Answer:

$\underline \mathscr \purple{Question \: : - }$

wht r the types of vaccines_??

$\underline \mathscr \purple{Answer \: : - }$

Vaccines are classified as follows:

(a) First generation vaccines: These are whole organism vaccines, either live and weakened (attenuated) or killed forms. e.g. Small pox, oral polio vaccine (OPV), BCG (Bacillus, Calmette, Guerin), Influenza vaccines are attenuated.

Vaccines against typhoid, rabies, cholera and Salk's polio vaccines are killed types.

(b) Second generation vaccines: These are subunit vaccines, consisting of defined protein antigens (such as tetanus or diphtheria toxoid) or recombinant protein components (such as hepatitis B surface antigen produced from yeast, Herpes vaccine).

(c)Third generation vaccines: These are DNA vaccines, made up of a plasmid that has been genetically engineered to produce one or two specific proteins (antigens) from a pathogen. The vaccine DNA is injected into the cells of the body, where the host cell reads the DNA and synthesizes the pathogen's protein. Because these proteins are recognized as foreign, the immune system is alerted and a range of immune responses are triggered. e.g. third generation hepatitis B vaccine has been developed.

The use of vaccines and immunization programmes have enabled us to completely eradicate a deadly disease like smallpox.

Answer 2

Answer:

corona vaccine