The World Health Organization (WHO) announced yesterday one of the three candidate vaccines against Sudan ebolavirus (SUDV) arrived in the Republic of Uganda. The Sabin Institute's ChAd3-SUDV vaccine is one of the three candidates. The other two, cAdOx1 biEBOV from Oxford University/Jenner Institute/Serum Institute of India and Merck/IAVI's SV-SUDV, will be added to the trial when the vaccines arrive.