In this task, you are given one French sentence. The major part of the sentences talk about health-related topics, but some of the them describe an organization and its activities. Your job is to translate the given sentences into English.

Input: Consider Input: Depuis 1997, une souche particulierement agressive de grippe aviaire hautement pathogene, connue sous le nom d'A/H5N1, est apparue.

Output: Since 1997, a particularly aggressive strain of highly pathogenic bird flu known as A/H5N1 has emerged.

Input: Consider Input: La vaccination HBV est actuellement le moyen le plus efficace de prevenir l'infection par le virus HBV

Output: HBV vaccination is currently the most effective way to prevent HBV infection

Input: Consider Input: L'ECDC ne conserve les donnees que pendant le temps necessaire aux fins de leur collecte ou de leur traitement ulterieur;
Output: ECDC only keeps the data for the time necessary to fulfil the purpose of collection or further processing.