3

[graph]

Figure 1: Vaccination of animals and the course
of the foot-and-mouth disease epizootics
in the first zone.

[legend of graph]
1. number of affected animals;
2. number of animals becoming immune as a result of their pulling over, vaccination
and revaccination;
3. number of vaccinated and revaccinated animals;
4. the actual period of the epizootics being stopped;
5. theoretical calculations of the periods at
which the epizootics came to an end.

Key: 1.Number of animals, %; 2.Months.

In the third zone (Figure 3) the animals were being already
immunized with the foot-and-mouth disease vaccine before the
outbreak and hence 94.2% of the cattle were not susceptible to
foot-and-mouth disease. These districts contained only 7.9% of
all the affected foci in Ukraine with 4.5% of animals being sick.
The epizootics stopped five months after they began. The theoretical
calculations and the periods at which the epizootics
actually stopped coincided.

Thus, in the liquidation of the foot-and-mouth disease
epizootics in Ukraine caused by the virus of type A22 along with
the strictly implemented organizational-cum-administrative and
veterinary-cum-sanitary measures very important was the use of
prophylactic vaccination, which in the beginning put a stop to
the spread of epizootics and then made its liquidation easy.

3.