A woman who lost her sight after contracting measles as a child is urging people to take the virus seriously. Olivia En contracted measles when she was 18 months old. She has memories from childhood of overhearing her mother weeping - because she felt such guilt and regret for her daughter's ordeal.
Her family - having fled the Pol Pot regime in 1975 - lived under the radar in Vietnam to avoid entering the refugee camps. Vaccines were not available. She says as a mother of four now, with vaccination just an appointment away, the decision to avoid reeks of privilege - and of people who have never had to bear witness to the horror that this virus can cause.
Measles rash. Photo: CDC Public Health Image Library