Now hundreds of hospital staffs are being vaccinated against measles. The vaccination was given to all those who were exposed to the hospital scenario.
Six nurses contracted the disease from the kids. Now the nurses were treated in an isolation unit at nearby Northwick Park Hospital.
They were allowed to go home after the treatment. Hospital visitors from the past few weeks who are feeling feverish are advised to contact their GP.
The hospital trust is at present working with the Health Protection Agency to take all the necessary precautions.
But news came around that a 13-year-old boy in the North West has died from the disease.
Measles spreads easily through close and direct contact with the affected person. Children, pregnant women and those who have a compromised immune system pose a serious risk of contracting the disease.