The virus that causes the deadly illness known as measles is very communicable. Before the measles vaccine's release in 1963 and widespread immunization, significant outbreaks occurred around every 2-3 years, and measles was thought to be responsible for 2.6 million annual deaths.
Despite the existence of a secure and reliable vaccination, more than 140 000 people died from measles in 2018, the majority of whom were children under the age of five.
The...