This graph shows the number of crew on the sick-list of the HMS Africa from 1917-1919. The huge spike in the autumn of 1918 is due to the Spanish Flu, which claimed the lives of up to 5% of the world’s population that year. Two thirds of the HMS Africa crew were affected. This data comes from the Old Weather project, where volunteers have been unveiling information like this contained in ship’s log books. Read more about the Spanish Flu data in this blog post by project lead Philip Brohan, and get involved today at