London Health Science's Centres (LHSC) has updated its visitor policy for Children's Hospital and Women's Care program because of the regional surge of measles cases.
At the Children's Hospital, only one parent or caregiver at a time will be permitted to stay with a child receiving care.
This will apply to children admitted, in the emergency department or attending outpatient appointments.
The regional hospital said exceptions will be made on a case-by-case basis.
Additionally, all parents and caregivers will be screened before entering and must provide proof of immunity or wear an N95 mask at all times and no siblings, other family members or friends will be allowed to enter.
LHSC proof of immunity includes a certificate showing two doses of the MMR vaccine, anyone born before 1970 or bloodwork results that show antibodies to the virus.
Meanwhile, for the Women's Care program there are different restrictions for each unit.
For outpatient clinic appointments if you are feeling unwell or have been exposed to measles over the past 21 days you are asked to call your physician or midwife.
The hospital said your care provider may choose to defer the appointment or to change it to virtual instead.
It said if that isn't possible, you will be required to wear a surgical mask.
Additionally, one support person may accompany you to your appointment if they feel well and children under seven will not be able to accompany those with an outpatient appointment.
For inpatient units, one adult support person may be with you at a time during your hospital stay if they feel well and are asked to stay by your side and only leaving the room when necessary.
The new policy is in effect immediately and will be in place until further notice.
Pediatric Emergency Medicine Director Dr. Rod Lim said the policy will be reviewed on an ongoing basis.
"Our goal is always just to be as safe as possible to our community and to our vulnerable patients," he said. "Patient and family centre care is at the heart of everything we do and we understand the burden that this places on families and patients but we are trying to be proactive."
Dr. Lim said so far there have not been any exposures our outbreaks in the Children's Hospital or Women's Care programs.
"We are constantly being vigilant to ensure that any potential exposures are quickly investigated and working together with the health unit, so proper tracking can occur," he said.
LHSC added some units who serve a more high-risk patient populations in place.
Recently, there have been exposures in Chatham-Kent, Windsor Essex, Huron-Perth and London-Middlesex.