"The pattern of checks of YF vaccination certificates and consequences do not appear to follow a rational procedure. Based on those inconsistent and unpredictable practices at Tanzanian borders we recommend YFV or a YF exemption certificate for all travellers to
Tanzania until further notice. The decision of whether to vaccinate against YF or to issue an exemption should be based on exposure risk to YF infection in other countries during travel. Travellers should be informed that YFV cards checks may be encountered independently of travel route and transit status."
Extrait de:
(Unpredictable checks of yellow fever vaccination certificates upon arrival in
Tanzania
Selina Schönenberger, MD, Christoph Hatz, MD, DTM&H, Silja Bühler, MD, MSc
Journal of Travel Medicine, Volume 23, Issue 5, September 2016, taw035,
www.ncbi.nlm.nih.gov/pubmed/27296582