<prompt> World health day is celebrated on which of the following day?1st December31st May7th April8th May  <response>: World health day is celebrated in 7thof April every year as a bih date of world health organization. Each year a theme is is selected for World Health Day that highlights a priority area of concern for WHO. - Theme for 2010 was Urbanization and health - Theme for 2011 was antimicrobial resistance and its global spread. 