Death rates in the 20th century fever, polio, measles, hepatitis among others. However, war, genocide and Holocausts have led to many millions of deaths throughout the century, and late in the century AIDS had already killed millions, particularly in Africa and south-east Asia. Cancer also killed millions via lifestyle and pollution generated by increased work in factories. During the 20th century, an enormous improvement in public health led to an overall decrease in death rates. Infant mortality rates and maternal mortality rates have dramatically decreased. In the early 1900s, 6-9 women died in pregnancy-related complications for every 1,000 births, while 100 infants died before they were
CAF Clubs of the 20th Century has not been considered. Clubs' performance on the first edition of the FIFA Club World Cup, held in Brazil in January 2000, has been included in the ranking. CAF's classification of African clubs is made on the following basis: Top Ten Africa's clubs of the 20th Century: Based on this statistical study, Egypt's Al-Ahly was named as "African club of the century" by the continental governing body on 31 December 2000. CAF Clubs of the 20th Century On 31 December 2000 the Confederation of African Football (CAF) has published a ranking with the most successful clubs of the 20th century