Toxoids : are from toxins produced by disease organism treated with formalin to produce toxoid vaccines.
Liver virulent vaccines: are living organisms that can cause livestock diseases.Their attack stimulates production of antibodies against them
Killed/dead vaccines: are diseases organisms that are killed by use of formaldehyde /phenol to control blackleg
-Live attenuated vaccines: are diseases causing organisms but their effect is reduced .
On attack they stimulate production of antibodies. Long storage makes them mutate and cause active diseases.
Kavungya answered the question on June 12, 2019 at 10:55
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