According to the World Health Organization (WHO), more than 61,000 people in East Africa contracted the disease in 1997, and 2,687 deaths were reported.
Maailma Tervishoiuorganisatsiooni (MTO) teadete kohaselt nakatus 1997. aastal Ida - Aafrikas sellesse haigusesse rohkem kui 61000 inimest ning surmajuhtumeid oli 2687.