Vaccination

A child is vaccinated before it is ill in order to prevent it becoming ill.
An animal should be vaccinated before it is ill, to prevent it becoming ill.
Vaccination tires animals a little, but it is not dangerous if the animals are well housed and well fed.

For example:

Chickens are vaccinated for fowl diphtheria, fowl cholera, fowl pest.
Cows are vaccinated for pneumonia and anthrax.
Pigs are vaccinated for anthrax and swine erysipelas.
Sheep are vaccinated for anthrax and foot- and- mouth disease.
You must take all the animals to be vaccinated.
Usually vaccination is compulsory and free of charge.
If all farmers do not take their animals to be vaccinated, the animals which have not been vaccinated may catch the disease. Then the disease remains in the district.