Hosted by the World Health Organization (WHO).
From the WHO website:
The Executive Board is composed of 34 technically qualified members elected for three-year terms. The annual Board meeting is held in January when the members agree upon the agenda for the World Health Assembly and the resolutions to be considered by the Health Assembly.
A second shorter meeting takes place in May, as a follow-up to the Health Assembly. The main functions of the Board are to implement the decisions and policies of the Health Assembly, and advise and generally to facilitate its work.
See provisional agenda here.