A Toronto-area mother's young children, who were voluntarily put in isolation after one of them was exposed to the measles virus at a doctor's office, are in the clear.

Jennifer Hibben-White's infant son, Griffin, was exposed to the disease last month after a visit to a doctor's office in Markham, Ont. Hibben-White's son was only 15 days old at the time, and was too young to get the vaccine.

Hibben-White also has a three-year-old daughter, who has only had her first dose of vaccine.

Both children were put in isolation after Hibben-White was informed by her doctor's office that someone who later developed measles was in the waiting room on Jan. 27, before her visit.

The mother of two later took to social media to blast anti-vaccine activists, saying that she was "angry as hell."

The post went viral, and has since been shared more than 294,000 times

On Tuesday, Hibben-White's husband, Glenn, told CTV Toronto that both children have not shown symptoms of the virus that can include a fever, cough or runny nose. The disease, which has a 21-day incubation period, can also cause deafness and brain damage.

In Ontario, 16 lab-confirmed cases of the virus have been reported, including one new case confirmed in Toronto on Monday.

Children are usually given a first dose of the measles-mumps-rubella vaccine at 12 months, and a second dose between the ages of 4 and 6.