Since 1987, the fight against rabies has been carried out by distributing more than 250 million baits containing oral vaccines to risk regions: there has been a 75% decrease of the disease in wild animal populations, without any reported side effect. In 2017, researchers from the University of Cambridge took inspiration to realize a similar oral vaccine to combat ebola in wild apes: still under experimentation, it has produced good results so far. Other groups are exploring the use of edible vaccines for livestock and even for humans, especially those living in the poorest regions, where the administration and storage of an oral vaccine would be easier than classical injections.