Ontario’s Chief Medical Officer of Health has confirmed the death of a prematurely born infant who was infected with measles prior to birth.
Dr. Kieran Moore issued a statement Tuesday saying the infant contracted the virus from their mother, who had not received the measles, mumps and rubella (MMR) vaccine. While measles may have contributed to the premature birth and death, the child also faced other serious medical complications unrelated to the virus.
“Out of respect for the family’s privacy, no further personal or medical details will be shared,” Moore said. “I extend my heartfelt condolences to the family during this incredibly difficult time.”
Moore also acknowledged the health-care professionals involved in the case, thanking them for their “compassion and expertise.”
He warned that measles poses a serious risk to unvaccinated individuals, particularly infants, and emphasized the importance of vaccination. “Two doses [of the MMR vaccine] provide nearly 100 per cent protection,” Moore said.
The province is continuing to respond to a large outbreak of measles, which began in New Brunswick in late 2024. Since Oct. 28, Ontario has reported 2,009 cases — 1,729 confirmed and 280 probable — including 140 hospitalizations. Most cases involve individuals who are unvaccinated or whose immunization status is unknown.
Health officials are urging residents, especially those who are pregnant or planning to become pregnant, to confirm their vaccination status. In southwestern Ontario, where the outbreak is most severe, infants aged six to 11 months are being offered early MMR doses.
Residents are encouraged to contact their health-care providers or local public health units with questions about immunization or potential exposure to measles.
