Editing Vitamin A (section)

===Vitamin A supplementation (VAS)===
[[File:Vitamin A supplementation coverage rate (children ages 6-59 months), OWID.svg|thumb|upright=1.6|Vitamin A supplementation coverage rate (children ages 6–59 months), 2014<ref>{{cite web|title=Vitamin A supplementation coverage rate (children ages 6–59 months)|url=https://ourworldindata.org/grapher/vitamin-a-supplementation-coverage-rate-children-ages-6-59-months|website=Our World in Data|access-date=6 March 2020|archive-date=23 April 2021|archive-url=https://web.archive.org/web/20210423201341/https://ourworldindata.org/grapher/vitamin-a-supplementation-coverage-rate-children-ages-6-59-months|url-status=live}}</ref>]]

Delivery of oral high-dose supplements remains the principal strategy for minimizing deficiency.<ref name="UNICEF 2007, p.3">{{cite book | publisher = UNICEF | url = http://www.unicef.org/publications/files/Vitamin_A_Supplementation.pdf | title = Vitamin A Supplementation: A Decade of Progress | location = New York | date = 2007 | page = 3 | isbn = 978-92-806-4150-9 | access-date = 23 January 2011 | archive-date = 31 October 2020 | archive-url = https://web.archive.org/web/20201031224103/https://www.unicef.org/publications/files/Vitamin_A_Supplementation.pdf | url-status = dead }}</ref> As of 2017, more than 80 countries worldwide are implementing universal VAS programs targeted to children 6–59 months of age through semi-annual national campaigns.<ref name="Wirth2017">{{cite journal | vauthors = Wirth JP, Petry N, Tanumihardjo SA, Rogers LM, McLean E, Greig A, Garrett GS, Klemm RD, Rohner F | title = Vitamin A Supplementation Programs and Country-Level Evidence of Vitamin A Deficiency | journal = Nutrients | volume = 9 | issue = 3 | page = 190 | date = February 2017 | pmid = 28245571 | pmc = 5372853 | doi = 10.3390/nu9030190 | doi-access = free | title-link = doi }}</ref> Doses in these programs are one dose of 50,000 or 100,000 IU for children aged 6 to 11 months and 100,000 to 200,000 IU for children aged 12 months to five years, every four to six months.<ref name="Imdad2017"/>