The varicella vaccine is first on the World Health Organization's List of Essential Medicines.
"Varicella vaccination is recommended in Canada for all healthy children aged 1 to 12, as well as susceptible adolescents and adults 50 years of age and younger; "may be considered for people with select immunodeficiency disorders; and "should be prioritized" for susceptible individuals, including "non-pregnant women of childbearing age, Household contacts of immunocompromised individuals, Members of a household expecting a newborn, Health care workers, Adults who may be exposed occupationally to varicella (for example, people who work with young children), Immigrants and refugees from tropical regions, People receiving chronic salicylate therapy (for example, acetylsalicylic acid [ASA])," and others
 The vaccine developed by Hilleman was first licensed in the United States in 1995

