400字世界衛生日英語作文：世界衛生日
on july 22, 1946, the un ecosoc held an international health conference in new york, more than 60 countries signed the charter of the world health organization, the world health organization (who) charter take effect on april 7, 1948. by day, to commemorate the organization charter in june 1948, the united nations in geneva on the first world health assembly was formally established the world health organization (who), and decide on july 22, from year to year would be a "world health day", the initiative countries hold commemorative activities. the following year, the second session of the world health assembly considering most of the national school has summer vacation in july each year, unable to attend the celebration, and regulations since 1950 on april 7, as a global "world health day".