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It costs 22 USD to vaccinate 100 rats. They are also given antibiotics to boost their immunity and a bit of vitamin.

The rats are also sold to schools, there are 15000 students across the country seating for Uganda's advanced level biology examinations. The rats are used in the practical paper. So the 15,000 students need 15,000 rats for the practicals. Also, since each of them will need to practice throughout the year, we may need a bigger number than the 15,000.