Yellow fever other feverish illnesses such as malaria. Other viral hemorrhagic fevers, such as Ebola virus, Lassa virus, Marburg virus, and Junin virus, must be excluded as the cause. Personal prevention of yellow fever includes vaccination and avoidance of mosquito bites in areas where yellow fever is endemic. Institutional measures for prevention of yellow fever include vaccination programmes and measures of controlling mosquitoes. Programmes for distribution of mosquito nets for use in homes are providing reductions in cases of both malaria and yellow fever. Use of EPA-registered insect repellent is recommended when outdoors. Exposure for even a short time is enough for
Kreisliga Hessen system in 1919. Southern Germany, now without the Alsace and Lorraine regions, which had to be returned to France, was sub-divided into ten "Kreisligas", these being: The new Kreisliga Hessen was made up from ten clubs from both the Nordkreis and Westkreis leagues. The league winners of the Kreisligas advanced to the Southern championship. This system applied for the 1919-20 and 1920-21 season. In 1921-22, the Kreisliga Hessen was split into two groups of eight, increasing the number of tier-one clubs in the region to 16. The two league winners then played a final to determine the Hessen champion, which